Patent ID: 11949210
Assignee: HORIBA, LTD.
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A semiconductor laser device used for optical analysis, the semiconductor laser device comprising:
a semiconductor laser element that is a quantum cascade laser;
a temperature detecting element that detects temperature of the semiconductor laser element;
a multilayer ceramic substrate that is a single substrate having an upper surface that includes metal layers and a bottom surface facing in opposite directions, wherein the semiconductor laser element and the temperature detecting element are affixed to the upper surface of the multilayer ceramic substrate by direct attachment to the metal layers;
a Peltier element that physically contacts the bottom surface of the multilayer ceramic substrate and controls the temperature of the semiconductor laser element;
an output terminal that outputs an output of the temperature detecting element to an outside;
wiring that electrically connects the temperature detecting element and the output terminal; and
a heat capacity increasing part that is interposed between the temperature detecting element and the output terminal to increase heat capacity of the wiring and is configured by the multilayer ceramic substrate by embedding at least part of the wiring in the multilayer ceramic substrate.