Low divergence laser diode
US5801403A · kind A · utility
7Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1997 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Apr 4, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The cavity of a laser diode is made longer than that which would be dictated by consideration of maximizing the efficiency of the diode. The lateral divergence of the emitted light beam is decreased as the cavity length increases. The lower lateral divergence enables the emitted light beam being focused to produce a greater depth of field for coupling into an optical fiber. In another case, when the fiber size is fixed, lower lateral divergence enables the emitted light beam to being fed into a lower numerical aperture fiber, or enables the beam divergence after fiber to be lower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.