NOISE AND GAIN IN SUBTHRESHOLD LASER MODES

被引：16

作者：

HARRIS, M ^{[1
]}

LOUDON, R ^{[1
]}

SHEPHERD, TJ ^{[1
]}

VAUGHAN, JM ^{[1
]}

机构：

[1] ROYAL SIGNALS & RADAR ESTAB,DRA,DIV ELECTR,MALVERN WR14 3PS,ENGLAND

来源：

OPTICS COMMUNICATIONS | 1992年 / 91卷 / 5-6期

关键词：

D O I：

10.1016/0030-4018(92)90364-W

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have observed intensity-fluctuation noise centred around the frequency corresponding to the longitudinal mode separation for a single-mode argon-ion laser. The noise arises from beating between the lasing mode and spontaneous emission into the sub-threshold modes on either side. The noise profiles are compared with gain profiles obtained for above-threshold laser amplification of an injected signal. Both sets of profiles broaden and shift with increasing laser power and appear identical in the case of symmetric sub-threshold modes. However, remarkable differences between noise and gain are observed for asymmetric tuning. The results are in good agreement with a theory for the gain which incorporates field coupling at signal and image frequencies via modulation of the population inversion.

引用

页码：383 / 389

页数：7

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