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United States Patent | 5,311,526 |
Gorfinkel ,   et al. | May 10, 1994 |
We have discovered that coherent variation of at least two laser parameters can result in improved device performance, e.g., in pure amplitude or frequency modulation at frequencies substantially above 1 GHz, or in previously unattainable modulation frequencies. Among the relevant laser parameters are pumping rate, optical gain coefficient, photon lifetime, confinement factor, effective carrier temperature, output frequency and spontaneous emission factor. Exemplarily, the pumping rate and the optical gain are coherently varied such that the output radiation is free of chirp, or the output frequency and the effective carrier temperature are coherently varied such that the output radiation has constant amplitude.
Inventors: | Gorfinkel; Vera B. (Baunatal-Altenritte, DE); Luryi; Serge (Bridgewater, NJ) |
Assignee: | AT&T Bell Laboratories (Murray Hill, NJ) |
Appl. No.: | 022249 |
Filed: | February 25, 1993 |
Current U.S. Class: | 372/26; 372/31 |
Intern'l Class: | H01S 003/10 |
Field of Search: | 372/26,31 |
4750833 | Jun., 1988 | Jones | 356/73. |
5023878 | Jun., 1991 | Berthold et al. | 372/20. |
5172382 | Dec., 1992 | Loh et al. | 372/26. |
5182756 | Jan., 1993 | Waki et al. | 372/26. |
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