Coherent light generators – Particular resonant cavity – Distributed feedback
Patent
1997-09-18
1999-08-10
Bovernick, Rodney
Coherent light generators
Particular resonant cavity
Distributed feedback
372 50, 372 33, 372102, 372 45, 372 46, 372 20, H01S 308, H01S 310
Patent
active
059369949
ABSTRACT:
A complex coupled (gain coupled or loss coupled) distributed feedback (DFB) semiconductor laser, having two sections axially distinct along a cavity length direction, and two excitation means for independent pumping of corresponding sections of the laser in a master and slave type of pumping control, is provided. An extended continuous wavelength tuning range of the laser is obtained by selectively activating a left Bragg mode or a right Bragg mode across the stop band of the laser as a dominant lasing mode by the master and slave type of current injection control into different sections of the laser to alternate gain coupling and loss coupling mechanisms of laser operation, and further tuning a wavelength around the activated Bragg mode. Methods of operating the laser, enhancing a tuning range, and fabricating thereof are provided.
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Hong Jin
Kim Hyung B.
Makino Toshi
Bovernick Rodney
de Wilton Angela
Donnelly Victoria
Kim Sung T.
Northern Telecom Limited
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