Coherent light generators – Particular active media – Semiconductor
Patent
1994-05-03
1996-08-27
Bovernick, Rodney B.
Coherent light generators
Particular active media
Semiconductor
372 28, 372 32, H01S 318
Patent
active
055508553
ABSTRACT:
In an optical modulator including a laser light source emitting laser light and a modulator, a modulation signal source for applying a modulation signal to the modulator, a signal processor for producing and outputting a signal in response to a change in the modulation signal, and a driving current source for generating a driving current applied to the laser light. Wavelength chirping modulation reverse to the wavelength chirping occurring in the modulator is produced in the light emitted from the laser by modulation of the driving current whereby wavelength chirping produced by the modulator is at least partially cancelled and wavelength chirping of the light output from the modulator is reduced.
REFERENCES:
patent: 5238799 (1994-02-01), Jacquet et al.
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Fishman, D. A., "Design and Performance of Externally Modulated 1.5-.mu.m Laser Transmitter in the Presence of Chromatic Dispersion", Journal of Lightwave Technology, vol. 11, No. 4, Apr. 1993, New York, USA., pp. 624-632.
Lourtioz et al, "Fourier-Transform-Limited Pulses from Gain-Switched Distributed-Bragg-Reflector Lasers Using Simultaneous Modulation of Gain and Phase Sections", Electronics Letters, 30 Jul., 1992, vol. 28, No. 16, pp. 1499-1500.
Mak et al, "High-Speed Bulk InGaAsP-InP Electroabsorption Modulators With Bandwidth In Excess Of 20 GHz", IEEE Photonics Technology Letters, vol. 2, No. 10, Oct. 1990, pp. 730-733.
Aoyagi Toshitaka
Isshiki Kunihiko
Miyazaki Yasunori
Watanabe Hitoshi
Bovernick Rodney B.
McNutt Robert
Mitsubishi Denki & Kabushiki Kaisha
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