High-finesse cavity external optical feedback DFB laser with hertz relative linewidth

被引：34

作者：

Zhao, Yang ^{[1
,2
]}

Wang, Qiang ^{[1
,2
]}

Meng, Fei ^{[1
]}

Lin, Yige ^{[1
]}

Wang, Shaokai ^{[1
]}

Li, Ye ^{[1
]}

Lin, Baike ^{[1
]}

Cao, Shiying ^{[1
]}

Cao, Jianping ^{[1
]}

Fang, Zhanjun ^{[1
]}

Li, Tianchu ^{[1
]}

Zang, Erjun ^{[1
,2
]}

机构：

[1] Natl Inst Metrol, Div Time & Frequency Metrol, Beijing 100013, Peoples R China

[2] Tsinghua Univ, Dept Precis Instruments & Mechanol, Beijing 100084, Peoples R China

来源：

OPTICS LETTERS | 2012年 / 37卷 / 22期

关键词：

DIODE-LASER; SEMICONDUCTOR-LASERS; FREQUENCY STABILIZATION; RESONATOR; LOCKING; NOISE;

D O I：

10.1364/OL.37.004729

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report hertz level relative linewidth distributed feedback diode lasers with external optical feedback from a high finesse F-P cavity, and demonstrate the efficient phase noise suppression and laser linewidth reduction of the optical feedback technique. The laser phase noise is dramatically suppressed throughout the measurement frequency range. Especially at the Fourier frequency of 17 kHz, approximately the linewidth of the F-P reference cavity, the laser phase noise is significantly suppressed by more than 92 dB. Above this Fourier frequency, the noise maintains a white phase noise plateau as low as -124.4 dBc/Hz. The laser's FWHM linewidth is reduced from 7 MHz to 4.4 Hz, and its instantaneous linewidth is 220 mHz in the Lorentzian fitting. (C) 2012 Optical Society of America

引用

页码：4729 / 4731

页数：3

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