Light wavelength conversion module
AssigneeFuji Photo Film Co., Ltd.
InventorMasami Hatori
Life of this patent
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Abstract
The present invention provides a light wavelength conversion module in which an output light amount of a light wavelength conversion element increases monotonically as a driving current of a semiconductor laser increases. The light wavelength conversion module includes the semiconductor laser having an external resonator provided with a narrow band-pass filter, and the light wavelength conversion element for converting a laser beam emitted from the semiconductor laser to a second harmonic wave. A semiconductor laser, which emits a laser beam including a plurality of longitudinal mode spectra within an acceptable wavelength band of the light wavelength conversion element, is used in the light wavelength conversion module.
Claims24
A light wavelength conversion module comprising:
- (a) a light wavelength conversion element having a wavelength band, which when the light wavelength conversion element receives light within the wavelength band, emits light having a different wavelength;
- and
- (b) a semiconductor laser having an external resonator provided with a wavelength selecting element, the semiconductor laser being disposed for communicating light to the light wavelength conversion element and operable for producing light of a fundamental wavelength including a plurality of longitudinal mode spectra within the wavelength band of the light wavelength conversion element.
A light wavelength conversion module comprising:
- (a) a light wavelength conversion element having a wavelength band, which when the light wavelength conversion element receives light within the wavelength band, emits light having a different wavelength;
- and
- (b) a semiconductor laser having opposite emitting end surfaces and an external resonator, the semiconductor laser being operable for producing light of a fundamental wavelength including a plurality of longitudinal mode spectra within the wavelength band of the light wavelength conversion element, which is disposed for receiving light from one emitting end surface of the semiconductor laser, and the external resonator being disposed for receiving light from the other emitting end surface, the external resonator including a wavelength selecting element and a reflecting member disposed on an optical path for receiving the light, with the reflecting member disposed on the optical path opposite the wavelength selecting element from the semiconductor laser.
Dependencies are inferred from the claim text.