Coherent light generators – Particular resonant cavity – Unstable resonator
Patent
1989-11-17
1991-02-19
Gonzalez, Frank
Coherent light generators
Particular resonant cavity
Unstable resonator
372 99, 372101, 372108, H01S 308
Patent
active
049950509
ABSTRACT:
A diode laser external lens cavity configuration having a stripe mirror with two thin parallel stripes placed in front of the two lobes of the arrays for far field output pattern. The configuration includes a diode laser array or broad area laser, a lens system, such as a graded-index lens, disposed in front of the laser's front light emitting facet and the stripe mirror disposed in front of the lens system at the focal plane of the lens. The two stripes are parallel to one another on opposite sides of and equidistant from a vertical reference plane through the lens' center axis. One stripe is highly reflective, while the other is effectively only partially reflective having either a lower stripe reflectivity or shorter length than the first stripe. Other embodiments include a third stripe spaced from and collinear with the second stripe to form an etalon, and a grating in the cavity.
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patent: 4656641 (1987-04-01), Scifres et al.
C. J. Chang-Hasnain et al., "High Power with High Efficiency in a Narrow Single-Lobed Beam from a Diode Laser Array in an External Cavity", Applied Physics Letters 50 (21), May 25, 1987, pp. 1465-1467.
C. J. Chang-Hasnain et al., "Diffraction-Limited Emission from a Diode Laser Array in an Apertured Graded-Index Lens External Cavity", Applied Physics Letters 49 (11), Sep. 15, 1986, pp. 614-616.
Josef Berger et al., "Narrow Far-Field Beam from a Y-Junction Laser Array Using a Customized Spatial Filter in an External Cavity", Conference on Lasers and Electro-Optics, May 1, 1987, FD5.
Scifres Donald R.
Streifer William
Waarts Robert G.
Gonzalez Frank
Hansen Galen J.
Protsik Mark
Schneck Thomas
Spectra Diode Laboratories, Inc.
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