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Proceedings Paper

Widely tunable hybrid semiconductor lasers
Author(s): Ping-Chiek Koh; Richard G. S. Plumb
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Paper Abstract

A new hybrid design tunable semiconductor laser, with a wide tuning range, a narrow linewidth, simple tuning/control algorithms, low variations in output power across its tuning range and simple fabrication, is introduced. This hybrid laser consists of a large spot reflective amplifier (LS-RA) coupled to a Lithium Niobate Acousto-Optic Filter (AOF), giving wavelength selective feedback. The LS-RA waveguide is angled by 10 degrees to the coupling facet, but is normal to the other facet, giving reflectivities of 5 X 10-5 and 3 X 10-1 respectively. This amplifier structure allows maximum coupling to the AOF without stringent alignment tolerance. THe AOF consists of a 2-stage acoustic TE/TM converter with a high TE reflectivity coating at the end. A propagating surface acoustic wave is employed to phase-match the TE and TM modes of a specific wavelength, achieving a narrow-band feedback into the LS-RA. Output power and wavelength of the hybrid laser are controlled by the LS-RA current and RF drive frequency of the AOF respectively. Simulations using a Time-Domain Model and initial experiments have shown that the hybrid laser have a wide tuning range, narrow linewidth, SMSR >= 30 dB and low power variations across its tuning range.

Paper Details

Date Published: 30 April 1999
PDF: 10 pages
Proc. SPIE 3631, Optoelectronic Integrated Circuits and Packaging III, (30 April 1999); doi: 10.1117/12.348300
Show Author Affiliations
Ping-Chiek Koh, Univ. of Cambridge (United Kingdom)
Richard G. S. Plumb, Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 3631:
Optoelectronic Integrated Circuits and Packaging III
Michael R. Feldman; Michael R. Feldman; James G. Grote; Mary K. Hibbs-Brenner, Editor(s)

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