Coherent light generators – Particular beam control device – Mode discrimination
Patent
1995-12-11
1998-11-24
Davie, James W.
Coherent light generators
Particular beam control device
Mode discrimination
372 26, 372 27, 372 50, 372 96, H01S 310
Patent
active
058417990
ABSTRACT:
A semiconductor laser of the present invention includes a semiconductor laser structure having a waveguide extending along a resonance direction, an active layer provided at least partly in the waveguide, and a control unit for controlling the excited state of the semiconductor laser structure to change the relationship between wavelengths or propagation constants and threshold gains for transverse electric (TE) mode and transverse magnetic (TM) mode of the laser structure. The waveguide is designed such that threshold gains for the TE mode and the TM mode can be alternately made minimum under the control of the control unit.
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Canon Kabushiki Kaisha
Davie James W.
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