Noise reducing heat sink for semiconductor laser diodes

Details Noise reducing heat sink for semiconductor laser diodes Noise reducing heat sink for semiconductor laser diodes

1986-04-01

1987-08-18

James, Andrew J.

357 68, H01L 2336, H01L 2340

Patent

active

046880763

ABSTRACT:
A heat sink for optical elements such as semiconductor laser diodes which avoids focussed reflection back to the optical element of stress waves generated within the heat sink by excitation of the elements. The avoidance of this focussed reflection enhances optical performance of such elements and in particular improves the purity of the lasing spectra of semiconductor laser diodes. The heat sink is dimensioned and provided with surface contours to reflect elastic waves in a pattern to avoid focussing the waves at the optical element thus minimizing the disturbance in operation of the element induced by the concentration of focussed stress waves. The element may be mounted off center on the heat sink at a position which avoids concentrations of stress waves. A coating is optionally applied to appropriate heat sink surfaces to dampen the stress waves incident at those surfaces and thus attenuate reflection with the result of reduced disturbance of the optical element. A photodetector body is similarly structured to avoid stress or thermoelastic wave effects.

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patent: 4584688 (1986-04-01), Demeure et al.
Hutchins, "Copper Mesa Heat Sink for Heteojuction Lasers",-IBM Technical Disclosure Bulletin-vol. 17, No. 1, 6-1974, p. 282.

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