Patent ID: 11936162
Assignee: YOKOGAWA TEST & MEASUREMENT CORPORATION
Field: Optics (Instruments)
Classification: CPC H  G | IPC H

Claim 0:
1. A light source device comprising:
a semiconductor laser that has a first end surface and a second end surface parallel to each other, the first end surface and the second end surface constituting a first resonator, and the semiconductor laser being configured to emit laser light from the first end surface; and
an optical system that is disposed on an optical path of the laser light emitted from the semiconductor laser, that constitutes a second resonator with the second end surface of the semiconductor laser, and that has a reflection characteristic in which a reflectance of the optical system with respect to light of a prespecified wavelength width centered at a specified center wavelength of the semiconductor laser is higher than a reflectance of the first end surface,
wherein the first resonator is configured to cause a laser oscillation between the first end surface and the second end surface to emit the laser light from the first end surface,
wherein the first end surface has the reflectance with respect to the light of the prespecified wavelength width centered at the specified center wavelength of the semiconductor laser to cause the laser oscillation between the first end surface and the second end surface.