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The instantaneous linewidth in the process of tuning is a very important parameter of laser, however only static linewidth in steady state could be obtained by all kinds of measurement at present. So we proposed a method of measuring instantaneous linewidth by time-frequency analysis based on local mean decomposition, and after its validity of extracting the instantaneous phase noise of simulation signal was proved, we set the heterodyne measurement system with ultrashort delay (about 0.5 ns) which came from 10 cm optical path difference. Finally, we not only extracted the time-frequency spectrum of the beat signal’s phase noise power, but also obtained the instantaneous linewidth of distributed-feedback diode laser under the pulse current for the first time so far as we Rnow.
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Keywords:
- ultrashort delay /
- instantaneous linewidth /
- local mean decomposition /
- time-frequency spectrum
[1] Okoshi T, Kikuchi K, Nakayama A 1980 Electron. Lett. 16 630
[2] Richter L E, Mandelberg H I, Kruger M S 1986 IEEE J. Quantum Electron. 22 2070
[3] Daeson J W, Namkyoo P, Kerry J V 1992 IEEE Photon. Technol. 4 1063
[4] Ludvigsen H, Tossavainen M, Kaivola M 1998 Opt. Commun. 155 180
[5] Turner L D, Weber K P, Hawthorn C J, Scholten R E 2002 Opt. Commun. 201 391
[6] Han M, Wang A 2005 Appl. Phys. B 81 53
[7] Camatel S, Ferrero V 2008 J. Lightwave Technol. 26 3048
[8] Zhou W, Chong K M, Guo H 2008 Phys. Lett. A 372 4327
[9] Domenico G D, Schilt S, Thomann P 2010 Appl. Opt. 49 4801
[10] Bartalini S, Borri S, Galli I, Giusfredi G, Mazzotti D, Edamura T 2011 Opt. Express 19 17996
[11] Kikuchi K 2012 Opt. Express. 20 5291
[12] Liu J W, Du Z H, Qi R B, Xu K X 2012 Nanotechnol. Precision Eng. 10 332 (in Chinese) [刘景旺, 杜振辉, 齐汝宾, 徐可欣 2012 纳米技术与精密工程 10 332]
[13] Huang N E, Shen Z, Long S R 1998 Procedings of Royal Society A 454 903
[14] Smith J S 2005 J. R. Soc. Interface 2 443
[15] Henry C H 1982 IEEE J. Quantum Electron. 18 259
[16] Wang H Y, Qiu T S, Chen Z 2008 Nonstationary Random Signal Analysis and Processing (Second Edition) (Bei Jing: National Defense Industry Press) p5 (in Chinese) [王宏禹, 邱天爽, 陈喆 2008 非平稳随机信号分析与处理 (第2版) (北京: 国防工业出版社) 第5页]
[17] Zhang X D 2002 Modern Signal Processing (Second Edition) (Bei Jing: Thinghua University Press) p350 (in Chinese) [张贤达 2002 现代信号处理 (第2版) (北京: 清华大学出版社) 第350页]
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[1] Okoshi T, Kikuchi K, Nakayama A 1980 Electron. Lett. 16 630
[2] Richter L E, Mandelberg H I, Kruger M S 1986 IEEE J. Quantum Electron. 22 2070
[3] Daeson J W, Namkyoo P, Kerry J V 1992 IEEE Photon. Technol. 4 1063
[4] Ludvigsen H, Tossavainen M, Kaivola M 1998 Opt. Commun. 155 180
[5] Turner L D, Weber K P, Hawthorn C J, Scholten R E 2002 Opt. Commun. 201 391
[6] Han M, Wang A 2005 Appl. Phys. B 81 53
[7] Camatel S, Ferrero V 2008 J. Lightwave Technol. 26 3048
[8] Zhou W, Chong K M, Guo H 2008 Phys. Lett. A 372 4327
[9] Domenico G D, Schilt S, Thomann P 2010 Appl. Opt. 49 4801
[10] Bartalini S, Borri S, Galli I, Giusfredi G, Mazzotti D, Edamura T 2011 Opt. Express 19 17996
[11] Kikuchi K 2012 Opt. Express. 20 5291
[12] Liu J W, Du Z H, Qi R B, Xu K X 2012 Nanotechnol. Precision Eng. 10 332 (in Chinese) [刘景旺, 杜振辉, 齐汝宾, 徐可欣 2012 纳米技术与精密工程 10 332]
[13] Huang N E, Shen Z, Long S R 1998 Procedings of Royal Society A 454 903
[14] Smith J S 2005 J. R. Soc. Interface 2 443
[15] Henry C H 1982 IEEE J. Quantum Electron. 18 259
[16] Wang H Y, Qiu T S, Chen Z 2008 Nonstationary Random Signal Analysis and Processing (Second Edition) (Bei Jing: National Defense Industry Press) p5 (in Chinese) [王宏禹, 邱天爽, 陈喆 2008 非平稳随机信号分析与处理 (第2版) (北京: 国防工业出版社) 第5页]
[17] Zhang X D 2002 Modern Signal Processing (Second Edition) (Bei Jing: Thinghua University Press) p350 (in Chinese) [张贤达 2002 现代信号处理 (第2版) (北京: 清华大学出版社) 第350页]
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