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US 4,785,462 AGranted
Dynamically one-mode semiconductor laser
AssigneeSiemens Aktiengesellschaft
InventorRudolf Keil
Life of this patent
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Abstract
A dynamically one-mode semiconductor laser having a laser diode with a coupled external resonator includes a resonator mirror disposed opposite a light emitting face of the laser diode and a collimation optics between the diode and the resonator mirror. The collimation optics includes a refractive hemispherical micro-lens having flat side applied to the resonator mirror which is manufactured by fusing a small drop of glass onto the resonator mirror.
Claims9
A dynamically one-mode semiconductor laser including a laser diode, comprising:
- a coupled external resonator having a resonator mirror disposed opposite a light emitting face of said laser diode;
- and
- collimation optics disposed between said laser diode and said resonator mirror, said collimation optics including a refractive hemispherical micro-lens, a flat side of said hemispherical micro-lens being directly applied to a mirror surface of said resonator mirror.
A dynamically single-mode semiconductor laser, comprising:
- a laser diode having a laser active region along an axis and opposing emitting faces substantially perpendicular to said axis;
- an external resonator disposed spaced from a first of said emitting faces, said external resonator including a mirror substantially perpendicular to said axis;
- and
- a collimation optic member in the form of a hemispherical lens mounted directly on said mirror facing said first emitting face of said laser diode, a radius of curvature of said hemispherical lens being substantially coincident with said axis.
1 more element
Dependencies are inferred from the claim text.