Coherent light generators – Particular beam control device – Mode locking
Patent
1996-05-03
1997-12-09
Bovernick, Rodney B.
Coherent light generators
Particular beam control device
Mode locking
372 20, 372 50, 372 99, H01S 3098
Patent
active
056967799
ABSTRACT:
A wavelength tunable, semiconductor laser includes a gain region, e.g., a flared amplifier region, that permits light propagation with a diverging phase front along at least a portion of the gain region. Optical feedback defines a resonant laser cavity that has a first reflector at a first end of the cavity a second reflector at a second end of the cavity for reflecting at least a portion of the light back propagating in the cavity back into the cavity. Wavelength tuned selection, such as through orientation of a grating reflector or via a prism, is provided in the resonant laser cavity for producing a relatively lower optical loss in the cavity to a selected wavelength or a band of wavelengths of the light propagating within the cavity relative to other nonselected wavelengths such that stable laser oscillation is established at the selected wavelength or band of wavelengths. A single spatial mode region disposed in the resonant laser cavity with at least a portion modulated independent of the excitation of the gain region can be used to achieve mode locked operation of the laser.
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Mehuys David G.
Scifres Donald R.
Welch David F.
Bovernick Rodney B.
Carothers, Jr. W. Douglas
SDL Inc.
Sunghavi Hemang
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