Light source device

Details Light source device Light source device

1989-12-04

1991-10-22

Arnold, Bruce Y.

Optical: systems and elements

Optical frequency converter

Harmonic generator

359743, 359565, 359641, 385 33, 385 37, G02B 632, G02B 634

Patent

active

050589814

ABSTRACT:
A device for generating a second harmonic from a laser source is disclosed. The light from the laser passes through an optical fiber in which the second harmonic is generated. The light exiting from the optical fiber has a conical wave surface which is incident upon a collimating lens. Because the collimating lens has a diffraction lattice formed thereon, it is easy and efficient to collimate the second harmonic. It is also possible to decrease the size of the apparatus due to the use of the diffraction lattice formed on the collimator lens. This enable such a device to be particularly useful with a small sized light source such as a semiconductor laser.

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Kawano et al., "Combination Lens Method for Coupling Laser Diode to a Single-Mode Fiber", Applied Optics; vol. 24, No. 7; Apr. 1985, pp. 984-989.

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