Optical waveguides – With optical coupler – Particular coupling structure
Patent
1992-12-17
1994-07-26
Gonzalez, Frank
Optical waveguides
With optical coupler
Particular coupling structure
385 50, 372 50, 359341, G02B 626
Patent
active
053332199
ABSTRACT:
The present invention relates to a new tunable filter which, when used as an intracavity mode selecting filter in a semiconductor laser structure, provides a large tuning range. The disclosed filter is, in one embodiment, a two branch asymmetric Y-branch tunable filter where the ends of the two branches terminate at a common plane. In another embodiment, the invention is realized by using a cascade of two or more Y-branches to place several asymmetrical Y-branch filters in parallel.
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"Integrated Interferometric Injection Laser: Novel Fast and Broad-Band Tunable Monolithic Light Source" M. Schilling, et al., IEEE J. Quantum Electronics, vol. 27, No. 6, Jun. 1991 pp. 1616-1624.
"Multibranch Frequency-Selective Reflectors and Application to Tunable Single-Mode Semiconductor Lasers" S. E. Miller, J. Lightwave Technology, vol. 7, No. 4, Apr. 1989, pp. 666-673.
"Asymmetrical Y Laser With Simple Single Current Tuning Response" M. Schilling et al., Electronics Letters, vol. 28, No. 18, Aug. 1992, pp. 1698-1699.
AT&T Bell Laboratories
Gonzalez Frank
Ranieri Gregory C.
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