Wide strip diode laser employing a lens

Details Wide strip diode laser employing a lens Wide strip diode laser employing a lens

1991-10-11

1993-04-27

Davie, James W.

Coherent light generators

Particular resonant cavity

Specified cavity component

372 92, H01S 308

Patent

active

052068781

ABSTRACT:
An improved diode laser is attained by augmenting the conventional diode laser structure with a cylindrical lens that arrests the divergence of the beam in the spatial direction where it is rapidly diverging. To properly arrest the divergence of the beam and to thereby circularize it, the cylindrical lens is placed at a point in space where the size of the laser beam in the two orthogonal spatial directions is substantially the same. With proper selection of the lens' focal length, the nearly circular cross section of the light is maintained as it travels away from the diode laser. The diode laser is further improved by making the diode structure facet that is closest to the lens highly transmissive, and forming a partially reflective facet on the otherside of the lens. The elongates the resonance cavity.

REFERENCES:
patent: 5081639 (1992-01-01), Snyder et al.
Cleo '91, Baltimore, Maryland, May 12-17, 1991, 'Cylindrical Microlenses for Collimating Laser Diodes, Snyder et al, Conference Proceedings, pp. 28-31.
"Solid State Laser Engineering", W. Koechner, Springer-Verlag, 1976, Section 5.1.2, pp. 176-178.

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