Extended tuning in external cavity quantum cascade lasers
US7826503B2 · kind B2 · utility
23Cited by
28References
24Claims
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Key dates
| Filing date | Sep 4, 2008 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Jan 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/3401
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a semiconductor lasers using quantum well gain medium, a quantum well stack is mounted in an epi-down configuration. The epitaxial side of the device may be directly bonded to an efficient heat transport system so that heat may more easily leave the quantum well stack layers and be disposed at a heatsink. Such a device runs cooler and exhibits reduced loss mechanisms as represented by a laser system loss-line. External cavity systems using this configuration may permit a high degree of tunability, and these systems are particularly improved as the tuning range is extended by lowered cavity losses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.