semiconductor laser equipment

Abstract

Abstract PURPOSE:To produce a detecting light without light loss and to reduce the size and weight of a semiconductor laser device by arranging a photolead unit at one light emitting side of a semiconductor laser element for emitting lights in bidirections. CONSTITUTION:A thermoelectric cooling element 12 is mounted on a heat sink fin 13, and a copper heat sink 8 is secured onto the element through an insulating layer 11 and a metal plate 10. Then, when photolead units each of which has a semiconductor laser element 1 of GaAsAlGaAs double hetero structure and a photodetector 5 made of a solar battery or the like are aligned and arranged on the sink 8, a difference is formed on the surface, on which the photodetector 5 is placed, and the placing surface of the element 1 is projected. In other words, the photodetector 5 in which an insulating layer 9 is covered on the bottom and the side of the element 1 is disposed at the side of the light 4 of the laser lights 3, 4 emitted from the active layer 2 of the element 1 in bidirections, the output from there is amplified by an amplifier 6 as a detecting light. In this manner, the monitoring light can be produced without loss.

Inventors

• 👤 Ryoichi Ito
• 👤 良一 伊藤

Bibliographic Details