QUANTUM-NOISE OF FREE-RUNNING AND EXTERNALLY-STABILIZED LASER-DIODES

被引：83

作者：

ZHANG, TC ^{[1
]}

POIZAT, JP ^{[1
]}

GRELU, P ^{[1
]}

ROCH, JF ^{[1
]}

GRANGIER, P ^{[1
]}

MARIN, F ^{[1
]}

BRAMATI, A ^{[1
]}

JOST, V ^{[1
]}

LEVENSON, MD ^{[1
]}

GIACOBINO, E ^{[1
]}

机构：

[1] SHANXI UNIV, INST OPTOELECTR, TAIYUAN 030006, PEOPLES R CHINA

来源：

QUANTUM AND SEMICLASSICAL OPTICS | 1995年 / 7卷 / 04期

关键词：

D O I：

10.1088/1355-5111/7/4/015

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have investigated the intensity and phase noise of single-mode laser diodes, either free-running or using different types of line narrowing techniques at room temperature, namely feedback from an external grating and injection locking. We have measured an intensity squeezing of 1.2 dB in the first case, and 1.4 dB in the second case (respectively, 1.6 dB and 2.3 dB inferred at the laser output). We have observed that the intensity noise of a free-running 'single-mode' laser diode actually results from a cancellation effect between large anticorrelated fluctuations of the main mode and of weak longitudinal side modes. It is also shown that free-running diodes exhibit very large excess phase noise, typically more than 80 dB above shot noise at 10 MHz, which can be significantly reduced by the above-mentioned techniques.

引用

页码：601 / 613

页数：13

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