Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution
We propose and demonstrate an approach to generate stable and high extinction ratio light pulses with an extinction ratio 80 dB. To this end, a high stable bias locking technique is proposed, and a small size, easily integrated, cost-effective pulse generator based on delay line chips is designed an...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Xuyang Wang [verfasserIn] |
|---|
| Format: |
Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2015 |
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| Schlagwörter: |
continuous variable quantum key distribution high extinction ratio light pulse lithium niobate-based Mach-Zehnder intensity modulator |
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| Übergeordnetes Werk: |
Enthalten in: IEEE journal of quantum electronics - New York, NY : IEEE, 1965, 51(2015), 6, Seite 1-6 |
|---|---|
| Übergeordnetes Werk: |
volume:51 ; year:2015 ; number:6 ; pages:1-6 |
| Links: |
|---|
| DOI / URN: |
10.1109/JQE.2015.2427031 |
|---|
| Katalog-ID: |
OLC196582188X |
|---|
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| 245 | 1 | 0 | |a Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution |
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| 520 | |a We propose and demonstrate an approach to generate stable and high extinction ratio light pulses with an extinction ratio 80 dB. To this end, a high stable bias locking technique is proposed, and a small size, easily integrated, cost-effective pulse generator based on delay line chips is designed and constructed. The pulse generator can generate voltage >12.5 V at a load impedance of 50 Ω, which is enough to drive the lithium niobate-based Mach-Zehnder (LNMZ) intensity modulator with a half wave voltage ~6-8 V. The pulse width and delay time can be programmed directly via digital I/O ports. The bias locking technique utilizes a successive scanning and fitting method which overcomes the sensitivity limit of the photodetector and can achieve the bias voltage accurately and quickly. By this method, the bias points of two or more cascaded LNMZ intensity modulators can be locked stably. The presented system can be easily integrated into the continuous variable quantum key distribution system. | ||
| 650 | 4 | |a optical pulse generation | |
| 650 | 4 | |a digital I-O ports | |
| 650 | 4 | |a bias voltage | |
| 650 | 4 | |a resistance 50 ohm | |
| 650 | 4 | |a laser mode locking | |
| 650 | 4 | |a bias voltage control | |
| 650 | 4 | |a Generators | |
| 650 | 4 | |a continuous variable quantum key distribution | |
| 650 | 4 | |a high extinction ratio light pulse | |
| 650 | 4 | |a Modulation | |
| 650 | 4 | |a bias points | |
| 650 | 4 | |a stable bias locking technique | |
| 650 | 4 | |a integrated optoelectronics | |
| 650 | 4 | |a Extinction ratio | |
| 650 | 4 | |a stable light pulse generation | |
| 650 | 4 | |a delay line chips | |
| 650 | 4 | |a quantum cryptography | |
| 650 | 4 | |a Photonics | |
| 650 | 4 | |a Detectors | |
| 650 | 4 | |a scanning method | |
| 650 | 4 | |a pulse generator | |
| 650 | 4 | |a optical delay lines | |
| 650 | 4 | |a quantum optics | |
| 650 | 4 | |a intensity modulation | |
| 650 | 4 | |a Quantum key distribution | |
| 650 | 4 | |a load impedance | |
| 650 | 4 | |a Delays | |
| 650 | 4 | |a delay time | |
| 650 | 4 | |a fitting method | |
| 650 | 4 | |a LiNbO 3 | |
| 650 | 4 | |a lithium niobate-based Mach-Zehnder intensity modulator | |
| 650 | 4 | |a high extinction ratio light pulse generation | |
| 650 | 4 | |a lithium compounds | |
| 650 | 4 | |a pulse width | |
| 650 | 4 | |a Noise | |
| 650 | 4 | |a optical modulation | |
| 650 | 4 | |a photodetector sensitivity limit | |
| 700 | 0 | |a Jianqiang Liu |4 oth | |
| 700 | 0 | |a Xuefeng Li |4 oth | |
| 700 | 0 | |a Yongmin Li |4 oth | |
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10.1109/JQE.2015.2427031 doi PQ20160617 (DE-627)OLC196582188X (DE-599)GBVOLC196582188X (PRQ)c2391-fed2d5e7bb37df374ba404cff26c36102abdca6ddfb53911de7fc5331f8f6cbc0 (KEY)0049496820150000051000600001generationofstableandhighextinctionratiolightpulse DE-627 ger DE-627 rakwb eng 620 DNB Xuyang Wang verfasserin aut Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We propose and demonstrate an approach to generate stable and high extinction ratio light pulses with an extinction ratio 80 dB. To this end, a high stable bias locking technique is proposed, and a small size, easily integrated, cost-effective pulse generator based on delay line chips is designed and constructed. The pulse generator can generate voltage >12.5 V at a load impedance of 50 Ω, which is enough to drive the lithium niobate-based Mach-Zehnder (LNMZ) intensity modulator with a half wave voltage ~6-8 V. The pulse width and delay time can be programmed directly via digital I/O ports. The bias locking technique utilizes a successive scanning and fitting method which overcomes the sensitivity limit of the photodetector and can achieve the bias voltage accurately and quickly. By this method, the bias points of two or more cascaded LNMZ intensity modulators can be locked stably. The presented system can be easily integrated into the continuous variable quantum key distribution system. optical pulse generation digital I-O ports bias voltage resistance 50 ohm laser mode locking bias voltage control Generators continuous variable quantum key distribution high extinction ratio light pulse Modulation bias points stable bias locking technique integrated optoelectronics Extinction ratio stable light pulse generation delay line chips quantum cryptography Photonics Detectors scanning method pulse generator optical delay lines quantum optics intensity modulation Quantum key distribution load impedance Delays delay time fitting method LiNbO 3 lithium niobate-based Mach-Zehnder intensity modulator high extinction ratio light pulse generation lithium compounds pulse width Noise optical modulation photodetector sensitivity limit Jianqiang Liu oth Xuefeng Li oth Yongmin Li oth Enthalten in IEEE journal of quantum electronics New York, NY : IEEE, 1965 51(2015), 6, Seite 1-6 (DE-627)12960299X (DE-600)241641-4 (DE-576)015096807 0018-9197 nnns volume:51 year:2015 number:6 pages:1-6 http://dx.doi.org/10.1109/JQE.2015.2427031 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7096921 http://search.proquest.com/docview/1685289449 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_59 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2004 GBV_ILN_2061 GBV_ILN_4306 AR 51 2015 6 1-6 |
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10.1109/JQE.2015.2427031 doi PQ20160617 (DE-627)OLC196582188X (DE-599)GBVOLC196582188X (PRQ)c2391-fed2d5e7bb37df374ba404cff26c36102abdca6ddfb53911de7fc5331f8f6cbc0 (KEY)0049496820150000051000600001generationofstableandhighextinctionratiolightpulse DE-627 ger DE-627 rakwb eng 620 DNB Xuyang Wang verfasserin aut Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We propose and demonstrate an approach to generate stable and high extinction ratio light pulses with an extinction ratio 80 dB. To this end, a high stable bias locking technique is proposed, and a small size, easily integrated, cost-effective pulse generator based on delay line chips is designed and constructed. The pulse generator can generate voltage >12.5 V at a load impedance of 50 Ω, which is enough to drive the lithium niobate-based Mach-Zehnder (LNMZ) intensity modulator with a half wave voltage ~6-8 V. The pulse width and delay time can be programmed directly via digital I/O ports. The bias locking technique utilizes a successive scanning and fitting method which overcomes the sensitivity limit of the photodetector and can achieve the bias voltage accurately and quickly. By this method, the bias points of two or more cascaded LNMZ intensity modulators can be locked stably. The presented system can be easily integrated into the continuous variable quantum key distribution system. optical pulse generation digital I-O ports bias voltage resistance 50 ohm laser mode locking bias voltage control Generators continuous variable quantum key distribution high extinction ratio light pulse Modulation bias points stable bias locking technique integrated optoelectronics Extinction ratio stable light pulse generation delay line chips quantum cryptography Photonics Detectors scanning method pulse generator optical delay lines quantum optics intensity modulation Quantum key distribution load impedance Delays delay time fitting method LiNbO 3 lithium niobate-based Mach-Zehnder intensity modulator high extinction ratio light pulse generation lithium compounds pulse width Noise optical modulation photodetector sensitivity limit Jianqiang Liu oth Xuefeng Li oth Yongmin Li oth Enthalten in IEEE journal of quantum electronics New York, NY : IEEE, 1965 51(2015), 6, Seite 1-6 (DE-627)12960299X (DE-600)241641-4 (DE-576)015096807 0018-9197 nnns volume:51 year:2015 number:6 pages:1-6 http://dx.doi.org/10.1109/JQE.2015.2427031 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7096921 http://search.proquest.com/docview/1685289449 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_59 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2004 GBV_ILN_2061 GBV_ILN_4306 AR 51 2015 6 1-6 |
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10.1109/JQE.2015.2427031 doi PQ20160617 (DE-627)OLC196582188X (DE-599)GBVOLC196582188X (PRQ)c2391-fed2d5e7bb37df374ba404cff26c36102abdca6ddfb53911de7fc5331f8f6cbc0 (KEY)0049496820150000051000600001generationofstableandhighextinctionratiolightpulse DE-627 ger DE-627 rakwb eng 620 DNB Xuyang Wang verfasserin aut Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We propose and demonstrate an approach to generate stable and high extinction ratio light pulses with an extinction ratio 80 dB. To this end, a high stable bias locking technique is proposed, and a small size, easily integrated, cost-effective pulse generator based on delay line chips is designed and constructed. The pulse generator can generate voltage >12.5 V at a load impedance of 50 Ω, which is enough to drive the lithium niobate-based Mach-Zehnder (LNMZ) intensity modulator with a half wave voltage ~6-8 V. The pulse width and delay time can be programmed directly via digital I/O ports. The bias locking technique utilizes a successive scanning and fitting method which overcomes the sensitivity limit of the photodetector and can achieve the bias voltage accurately and quickly. By this method, the bias points of two or more cascaded LNMZ intensity modulators can be locked stably. The presented system can be easily integrated into the continuous variable quantum key distribution system. optical pulse generation digital I-O ports bias voltage resistance 50 ohm laser mode locking bias voltage control Generators continuous variable quantum key distribution high extinction ratio light pulse Modulation bias points stable bias locking technique integrated optoelectronics Extinction ratio stable light pulse generation delay line chips quantum cryptography Photonics Detectors scanning method pulse generator optical delay lines quantum optics intensity modulation Quantum key distribution load impedance Delays delay time fitting method LiNbO 3 lithium niobate-based Mach-Zehnder intensity modulator high extinction ratio light pulse generation lithium compounds pulse width Noise optical modulation photodetector sensitivity limit Jianqiang Liu oth Xuefeng Li oth Yongmin Li oth Enthalten in IEEE journal of quantum electronics New York, NY : IEEE, 1965 51(2015), 6, Seite 1-6 (DE-627)12960299X (DE-600)241641-4 (DE-576)015096807 0018-9197 nnns volume:51 year:2015 number:6 pages:1-6 http://dx.doi.org/10.1109/JQE.2015.2427031 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7096921 http://search.proquest.com/docview/1685289449 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_59 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2004 GBV_ILN_2061 GBV_ILN_4306 AR 51 2015 6 1-6 |
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10.1109/JQE.2015.2427031 doi PQ20160617 (DE-627)OLC196582188X (DE-599)GBVOLC196582188X (PRQ)c2391-fed2d5e7bb37df374ba404cff26c36102abdca6ddfb53911de7fc5331f8f6cbc0 (KEY)0049496820150000051000600001generationofstableandhighextinctionratiolightpulse DE-627 ger DE-627 rakwb eng 620 DNB Xuyang Wang verfasserin aut Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We propose and demonstrate an approach to generate stable and high extinction ratio light pulses with an extinction ratio 80 dB. To this end, a high stable bias locking technique is proposed, and a small size, easily integrated, cost-effective pulse generator based on delay line chips is designed and constructed. The pulse generator can generate voltage >12.5 V at a load impedance of 50 Ω, which is enough to drive the lithium niobate-based Mach-Zehnder (LNMZ) intensity modulator with a half wave voltage ~6-8 V. The pulse width and delay time can be programmed directly via digital I/O ports. The bias locking technique utilizes a successive scanning and fitting method which overcomes the sensitivity limit of the photodetector and can achieve the bias voltage accurately and quickly. By this method, the bias points of two or more cascaded LNMZ intensity modulators can be locked stably. The presented system can be easily integrated into the continuous variable quantum key distribution system. optical pulse generation digital I-O ports bias voltage resistance 50 ohm laser mode locking bias voltage control Generators continuous variable quantum key distribution high extinction ratio light pulse Modulation bias points stable bias locking technique integrated optoelectronics Extinction ratio stable light pulse generation delay line chips quantum cryptography Photonics Detectors scanning method pulse generator optical delay lines quantum optics intensity modulation Quantum key distribution load impedance Delays delay time fitting method LiNbO 3 lithium niobate-based Mach-Zehnder intensity modulator high extinction ratio light pulse generation lithium compounds pulse width Noise optical modulation photodetector sensitivity limit Jianqiang Liu oth Xuefeng Li oth Yongmin Li oth Enthalten in IEEE journal of quantum electronics New York, NY : IEEE, 1965 51(2015), 6, Seite 1-6 (DE-627)12960299X (DE-600)241641-4 (DE-576)015096807 0018-9197 nnns volume:51 year:2015 number:6 pages:1-6 http://dx.doi.org/10.1109/JQE.2015.2427031 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7096921 http://search.proquest.com/docview/1685289449 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_59 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2004 GBV_ILN_2061 GBV_ILN_4306 AR 51 2015 6 1-6 |
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10.1109/JQE.2015.2427031 doi PQ20160617 (DE-627)OLC196582188X (DE-599)GBVOLC196582188X (PRQ)c2391-fed2d5e7bb37df374ba404cff26c36102abdca6ddfb53911de7fc5331f8f6cbc0 (KEY)0049496820150000051000600001generationofstableandhighextinctionratiolightpulse DE-627 ger DE-627 rakwb eng 620 DNB Xuyang Wang verfasserin aut Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier We propose and demonstrate an approach to generate stable and high extinction ratio light pulses with an extinction ratio 80 dB. To this end, a high stable bias locking technique is proposed, and a small size, easily integrated, cost-effective pulse generator based on delay line chips is designed and constructed. The pulse generator can generate voltage >12.5 V at a load impedance of 50 Ω, which is enough to drive the lithium niobate-based Mach-Zehnder (LNMZ) intensity modulator with a half wave voltage ~6-8 V. The pulse width and delay time can be programmed directly via digital I/O ports. The bias locking technique utilizes a successive scanning and fitting method which overcomes the sensitivity limit of the photodetector and can achieve the bias voltage accurately and quickly. By this method, the bias points of two or more cascaded LNMZ intensity modulators can be locked stably. The presented system can be easily integrated into the continuous variable quantum key distribution system. optical pulse generation digital I-O ports bias voltage resistance 50 ohm laser mode locking bias voltage control Generators continuous variable quantum key distribution high extinction ratio light pulse Modulation bias points stable bias locking technique integrated optoelectronics Extinction ratio stable light pulse generation delay line chips quantum cryptography Photonics Detectors scanning method pulse generator optical delay lines quantum optics intensity modulation Quantum key distribution load impedance Delays delay time fitting method LiNbO 3 lithium niobate-based Mach-Zehnder intensity modulator high extinction ratio light pulse generation lithium compounds pulse width Noise optical modulation photodetector sensitivity limit Jianqiang Liu oth Xuefeng Li oth Yongmin Li oth Enthalten in IEEE journal of quantum electronics New York, NY : IEEE, 1965 51(2015), 6, Seite 1-6 (DE-627)12960299X (DE-600)241641-4 (DE-576)015096807 0018-9197 nnns volume:51 year:2015 number:6 pages:1-6 http://dx.doi.org/10.1109/JQE.2015.2427031 Volltext http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7096921 http://search.proquest.com/docview/1685289449 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_59 GBV_ILN_70 GBV_ILN_170 GBV_ILN_2004 GBV_ILN_2061 GBV_ILN_4306 AR 51 2015 6 1-6 |
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optical pulse generation digital I-O ports bias voltage resistance 50 ohm laser mode locking bias voltage control Generators continuous variable quantum key distribution high extinction ratio light pulse Modulation bias points stable bias locking technique integrated optoelectronics Extinction ratio stable light pulse generation delay line chips quantum cryptography Photonics Detectors scanning method pulse generator optical delay lines quantum optics intensity modulation Quantum key distribution load impedance Delays delay time fitting method LiNbO 3 lithium niobate-based Mach-Zehnder intensity modulator high extinction ratio light pulse generation lithium compounds pulse width Noise optical modulation photodetector sensitivity limit |
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Xuyang Wang |
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Xuyang Wang ddc 620 misc optical pulse generation misc digital I-O ports misc bias voltage misc resistance 50 ohm misc laser mode locking misc bias voltage control misc Generators misc continuous variable quantum key distribution misc high extinction ratio light pulse misc Modulation misc bias points misc stable bias locking technique misc integrated optoelectronics misc Extinction ratio misc stable light pulse generation misc delay line chips misc quantum cryptography misc Photonics misc Detectors misc scanning method misc pulse generator misc optical delay lines misc quantum optics misc intensity modulation misc Quantum key distribution misc load impedance misc Delays misc delay time misc fitting method misc LiNbO 3 misc lithium niobate-based Mach-Zehnder intensity modulator misc high extinction ratio light pulse generation misc lithium compounds misc pulse width misc Noise misc optical modulation misc photodetector sensitivity limit Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution |
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620 DNB Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution optical pulse generation digital I-O ports bias voltage resistance 50 ohm laser mode locking bias voltage control Generators continuous variable quantum key distribution high extinction ratio light pulse Modulation bias points stable bias locking technique integrated optoelectronics Extinction ratio stable light pulse generation delay line chips quantum cryptography Photonics Detectors scanning method pulse generator optical delay lines quantum optics intensity modulation Quantum key distribution load impedance Delays delay time fitting method LiNbO 3 lithium niobate-based Mach-Zehnder intensity modulator high extinction ratio light pulse generation lithium compounds pulse width Noise optical modulation photodetector sensitivity limit |
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ddc 620 misc optical pulse generation misc digital I-O ports misc bias voltage misc resistance 50 ohm misc laser mode locking misc bias voltage control misc Generators misc continuous variable quantum key distribution misc high extinction ratio light pulse misc Modulation misc bias points misc stable bias locking technique misc integrated optoelectronics misc Extinction ratio misc stable light pulse generation misc delay line chips misc quantum cryptography misc Photonics misc Detectors misc scanning method misc pulse generator misc optical delay lines misc quantum optics misc intensity modulation misc Quantum key distribution misc load impedance misc Delays misc delay time misc fitting method misc LiNbO 3 misc lithium niobate-based Mach-Zehnder intensity modulator misc high extinction ratio light pulse generation misc lithium compounds misc pulse width misc Noise misc optical modulation misc photodetector sensitivity limit |
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ddc 620 misc optical pulse generation misc digital I-O ports misc bias voltage misc resistance 50 ohm misc laser mode locking misc bias voltage control misc Generators misc continuous variable quantum key distribution misc high extinction ratio light pulse misc Modulation misc bias points misc stable bias locking technique misc integrated optoelectronics misc Extinction ratio misc stable light pulse generation misc delay line chips misc quantum cryptography misc Photonics misc Detectors misc scanning method misc pulse generator misc optical delay lines misc quantum optics misc intensity modulation misc Quantum key distribution misc load impedance misc Delays misc delay time misc fitting method misc LiNbO 3 misc lithium niobate-based Mach-Zehnder intensity modulator misc high extinction ratio light pulse generation misc lithium compounds misc pulse width misc Noise misc optical modulation misc photodetector sensitivity limit |
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ddc 620 misc optical pulse generation misc digital I-O ports misc bias voltage misc resistance 50 ohm misc laser mode locking misc bias voltage control misc Generators misc continuous variable quantum key distribution misc high extinction ratio light pulse misc Modulation misc bias points misc stable bias locking technique misc integrated optoelectronics misc Extinction ratio misc stable light pulse generation misc delay line chips misc quantum cryptography misc Photonics misc Detectors misc scanning method misc pulse generator misc optical delay lines misc quantum optics misc intensity modulation misc Quantum key distribution misc load impedance misc Delays misc delay time misc fitting method misc LiNbO 3 misc lithium niobate-based Mach-Zehnder intensity modulator misc high extinction ratio light pulse generation misc lithium compounds misc pulse width misc Noise misc optical modulation misc photodetector sensitivity limit |
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Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution |
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generation of stable and high extinction ratio light pulses for continuous variable quantum key distribution |
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Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution |
| abstract |
We propose and demonstrate an approach to generate stable and high extinction ratio light pulses with an extinction ratio 80 dB. To this end, a high stable bias locking technique is proposed, and a small size, easily integrated, cost-effective pulse generator based on delay line chips is designed and constructed. The pulse generator can generate voltage >12.5 V at a load impedance of 50 Ω, which is enough to drive the lithium niobate-based Mach-Zehnder (LNMZ) intensity modulator with a half wave voltage ~6-8 V. The pulse width and delay time can be programmed directly via digital I/O ports. The bias locking technique utilizes a successive scanning and fitting method which overcomes the sensitivity limit of the photodetector and can achieve the bias voltage accurately and quickly. By this method, the bias points of two or more cascaded LNMZ intensity modulators can be locked stably. The presented system can be easily integrated into the continuous variable quantum key distribution system. |
| abstractGer |
We propose and demonstrate an approach to generate stable and high extinction ratio light pulses with an extinction ratio 80 dB. To this end, a high stable bias locking technique is proposed, and a small size, easily integrated, cost-effective pulse generator based on delay line chips is designed and constructed. The pulse generator can generate voltage >12.5 V at a load impedance of 50 Ω, which is enough to drive the lithium niobate-based Mach-Zehnder (LNMZ) intensity modulator with a half wave voltage ~6-8 V. The pulse width and delay time can be programmed directly via digital I/O ports. The bias locking technique utilizes a successive scanning and fitting method which overcomes the sensitivity limit of the photodetector and can achieve the bias voltage accurately and quickly. By this method, the bias points of two or more cascaded LNMZ intensity modulators can be locked stably. The presented system can be easily integrated into the continuous variable quantum key distribution system. |
| abstract_unstemmed |
We propose and demonstrate an approach to generate stable and high extinction ratio light pulses with an extinction ratio 80 dB. To this end, a high stable bias locking technique is proposed, and a small size, easily integrated, cost-effective pulse generator based on delay line chips is designed and constructed. The pulse generator can generate voltage >12.5 V at a load impedance of 50 Ω, which is enough to drive the lithium niobate-based Mach-Zehnder (LNMZ) intensity modulator with a half wave voltage ~6-8 V. The pulse width and delay time can be programmed directly via digital I/O ports. The bias locking technique utilizes a successive scanning and fitting method which overcomes the sensitivity limit of the photodetector and can achieve the bias voltage accurately and quickly. By this method, the bias points of two or more cascaded LNMZ intensity modulators can be locked stably. The presented system can be easily integrated into the continuous variable quantum key distribution system. |
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Generation of Stable and High Extinction Ratio Light Pulses for Continuous Variable Quantum Key Distribution |
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