| 简介 |
PROBLEM TO BE SOLVED : To realize the reduction of cost and downsizing of an entire apparatus, to prevent damage and deterioration of an optical fiber, and to make desired blue light as a light emitted from the optical fiber.
SOLUTION : The multi-wavelength laser light source is provided with a blue semiconductor laser device 2 to emit an excitation light (a) and a fluorescent fiber 17 which enters the excitation light (a) from the blue semiconductor laser device to the end face of one side, and emits it from the end face of the other side. The fluorescent fiber 17 is provided with dichroic mirrors on the respective fiber end faces to form a laser resonator 3, and its core is formed by a wavelength conversion member which contains in a low phonon glass at least praseodymium ions as a trivalent rare-earth ion that emits a wavelength conversion light by being excited by the excitation light (a).
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