Heterodyne gain and noise measurement of a 1. 5. mu. m resonant semiconductor laser amplifier

Journal Article · Thu May 01 04:00:00 EDT 1986 · IEEE J. Quant. Electron.; (United States)

OSTI ID:5697533

Olsson, N A

The noise and gain characteristics of a 1.5 ..mu..m resonant semiconductor laser amplifier have been measured. A heterodyne detection scheme was used to measure the gain and noise properties relevant to coherent communication applications. Measurements were made with the amplifier operating in unsaturated, saturated, and injection-locked regimes. Unsaturated internal gain as high as 29 dB was measured with the amplifier operating close to threshold. Measured signal-to-noise ratios agree well with calculated results and are 9 dB below the input quantum shot noise limit. A degradation in the amplifier performance is observed when operated above or at threshold. Gain saturation for high input powers also degrades the noise characteristics of the amplifier.

• Research Organization: AT and T Bell Laboratories, Murray Hill, NJ 07974
• OSTI ID: 5697533
• Journal Information: IEEE J. Quant. Electron.; (United States), Journal Name: IEEE J. Quant. Electron.; (United States) Vol. QE-22:5; ISSN IEJQA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
AMPLIFIERS
COMMUNICATIONS
ELECTRONIC EQUIPMENT
EQUIPMENT
GAIN
HETERODYNE RECEIVERS
LASERS
MICROWAVE EQUIPMENT
MODE LOCKING
NOISE
PERFORMANCE
RADIO EQUIPMENT
RESONANCE
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SIGNAL-TO-NOISE RATIO