NDLI: 80-ps and 4-ns pulse-pumped gains in a GaP-AlGaP semiconductor Raman amplifier

Content Provider	IEEE Xplore Digital Library
Author	Saito, S. Suto, K. Kimura, T. Jun-Ichi Nishizawa
Copyright Year	1989
Abstract	The characteristic of 80-ps mode-locked (ML) pulse-pumped gain, which results in a decline that changes from a linear gradient to a square-root gradient at introduced pump densities exceeding 10 dB, makes it difficult to develop pulse-pumped gains for high efficiency amplification. To overcome this disadvantage with pumping, we compared an 80-ps ML pulse and 4-ns Q-switched pulse in a straight waveguide. The amplification of the 4-ns pulse was linear and had a maximum gain of 23.3 dB at an introduced pump density of 1.4 W//spl mu/m/sup 2/ in a straight waveguide. The gain was more efficient than with the 80-ps pulse, which was limited by the optical damage threshold of the input antireflective coating (1.6 W//spl mu/m/sup 2/). These high-gain operations should enable semiconductor Raman amplifiers to be used for detecting signals from chemical or biological materials, in addition to infrared light frequency selective amplification with wavelength-division multiplexing in optical communications.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	395
Ending Page	397
Page Count	3
File Size	176739
File Format	PDF
ISSN	10411135
Volume Number	16
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse amplifiers Stimulated emission Semiconductor optical amplifiers Optical waveguides Optical pulses Infrared detectors Optical fiber communication Gain Semiconductor waveguides Biomedical optical imaging
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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