Collimated laser diode

Details Collimated laser diode Collimated laser diode

1990-04-12

1991-10-15

Arnold, Bruce Y.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

369103, 359 24, 385 14, G02B 532

Patent

active

050568817

ABSTRACT:
An optical source comprises (a) a laser light source for emitting light in a light path; and (b) at least one holographic optical element disposed in the light path; wherein the laser light source and the holographic optical element are integrated into a monolithic strucuture. The holographic optical element collimates emitted light, circularizes emitted light, compensates for optical source wavelength shifts, launches the emitted light so that it is efficiently coupled to an optical fiber, and/or isolates the laser light source from interfering reflected light. Since the optical source is disposed in a single monolithic structure and a discrete holographic optical element may perform five distinct functions, the optical sources are compact, commercially versatile and easy to handle.

REFERENCES:
patent: 4497534 (1985-02-01), Sincerbox
patent: 4731772 (1988-03-01), Lee
patent: 4779943 (1988-10-01), Tatsuno et al.
patent: 4794585 (1988-12-01), Lee
patent: 4993799 (1991-02-01), Stein
"Miniature Optics for Optical Recording", Gleen T. Sincerbox, SPIE vol. 935, Gradient-Index Optics and Miniature Optics (1988), pp. 63-76.
"Hybrid Diffractive-Refractive Lenses and Achromats", T. Stone and N. George, Applied Optics, vol. 27, No. 14, Jul. 15, 1988, pp. 2960-2971.
"Holographic Optical Head for Compact Disk Applications", W. Lee, Optical Engineering, vol. 28, No. 6, Jun. 1989, pp. 650-653.
"Diffractice Optical Elements for use in Infrared Systems", G. Swanson and W. Veldkamp, Optical Engineering, vol. 28, No. 6, Jun. 1989, pp. 605-608.

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