Laser diode element with excellent intermodulation distortion ch

Coherent light generators – Particular active media – Semiconductor

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372 50, H01S 319

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054694590

ABSTRACT:
In a laser diode element including a front facet, a rear facet, a laser cavity formed between the front rear facets and which has a predetermined length L, coating layers coated on the front facet to provide a reflectivity smaller than 5%, and an active layer and a uniform grating having regular corrugation formed in the direction of the layer cavity and which are coupled to each other at a predetermined coupling constant K, the laser diode element is specified by a product of the predetermined coupling constant and the predetermined length L and falling within a range between 0.4 and 1.0, both inclusive.

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IEEE Journal on Selected Areas in Communications, vol. 8, No. 7, Sep. 1990, pp. 1359-1364, A. Takemoto et al., "Distributed Feedback Laser Diode and Module for CATV Systems".
Patent Abstracts of Japan, vol. 16, No. 108, 17 Mar. 1992.
Electronic Letters, vol. 22, No. 20, 25 Sep. 1986, pp. 1047-1049, H. Soda et al., "Design of DFB Lasers for High-power Single-Mode Operation".
IEE Proceedings, Part J, voil. 133, No. 2, Apr. 1986, pp. 163-164, J. Buus, "Dynamic Single-Mode Operation of DFB Lasers with Phase Shifted Gratings and Reflection Mirrors".
Journal of Lightwave Technology, vol. 5, No. 6, Jun. 1987, pp. 848-855, H. Ishikawa et al., "Distributed Feedback Laser Emitting at 1.3 um for Gigabit Communication Systems".
IEEE Journal of Quantum Electronics, vol. 27, No. 8, Aug. 1991, pp. 1990-2002, G. Morthier et al, "Theoretical Invetigation of tyhe Second-Order Harmonic Distortion in the AM-Response of 1.55 um F-P and DFB Lasers".

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