Patent
Coherent light source and optical device
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TLDR
In this article, the authors proposed an oscillation mode of a semiconductor laser can be fixed to a single mode by feeding back beams projected from the wide stripe SLL to an active layer of the SLL, after having the beams permeate a mode transducer and a wavelength selecting filter.Abstract:
High power output can be easily obtained from a wide stripe laser, however, since its transverse mode is a multimode and an efficiency of coupling with a single mode waveguide and a single mode fiber is low, there have been problems in application to high-coherence devices. An oscillation mode of a semiconductor laser can be fixed to a single mode by feeding back beams projected from the wide stripe semiconductor laser to an active layer of the semiconductor laser, after having the beams permeate a mode transducer and a wavelength selecting filter.read more
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TL;DR: In this article, the authors present a laser wavelength converter of the present invention, where a condensed position of the infrared light in the wavelength conversion element is deviated from a position assumed to be optimal when the influence of generated heat is ignored.
References
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Laser marking system and method of energy control
TL;DR: In this article, a laser marking system consisting of a double-clad fiber having a doped core surrounded by an inner pump cladding and providing an optical output for marking is described.
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Method for stabilizing output of higher harmonic waves and short wavelength laser beam source using the same
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