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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 5, Iss. 1 — Jan. 1, 1988
  • pp: 147–159

Population pulsations and nondegenerate four-wave mixing in semiconductor lasers and amplifiers

Govind P. Agrawal  »View Author Affiliations


JOSA B, Vol. 5, Issue 1, pp. 147-159 (1988)
http://dx.doi.org/10.1364/JOSAB.5.000147


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Abstract

The theory of nondegenerate four-wave mixing (NDFWM) in semiconductor lasers and amplifiers is presented with particular emphasis on the physical processes that lead to population pulsations. In the case of nearly degenerate four-wave mixing, modulation of the carrier density at the beat frequency Ω of the pump and probe waves creates a dynamic population grating whose effectiveness is governed by the spontaneous carrier lifetime τs. Such a grating affects both the gain and the refractive index of the probe wave. In particular, the probe gain exhibits features analogous to those observed in a detuned atomic system arising from the optical Stark effect. Both the gain grating and the index grating contribute to NDFWM, with the dominant contribution coming from the index grating. For detunings such that Ωτs ≫ 1, population pulsations correspond to modulation of the intraband population arising from spectral hole burning. Our results show that NDFWM is then limited by the phase-mismatch effects governed by the transit time τ rather than by the intraband population-relaxation time T1. Significant NDFWM is expected to occur for detunings up to about 300 GHz for typical transit-time values of 3 psec in semiconductor lasers.

© 1988 Optical Society of America

History
Original Manuscript: June 8, 1987
Manuscript Accepted: September 14, 1987
Published: January 1, 1988

Citation
Govind P. Agrawal, "Population pulsations and nondegenerate four-wave mixing in semiconductor lasers and amplifiers," J. Opt. Soc. Am. B 5, 147-159 (1988)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-5-1-147

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