Collimated laser diode
US5056881A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Apr 12, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4204
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.