| Autor: |
S. Fox, Mario Dagenais, S.A. Merritt, Peter J. S. Heim, B. Gopalan, S. Kareenahalli, C.E.C. Wood, Vijayanand Vusirikala, S.H. Cho |
| Rok vydání: |
1995 |
| Předmět: |
|
| Zdroj: |
Optical Amplifiers and Their Applications. |
| DOI: |
10.1364/oaa.1995.thc2 |
| Popis: |
Tapered semiconductor laser amplifiers have been one of the most successful approaches for producing high optical power in a diffraction limited beam [1-4]. Until now, this work has been done using anti-reflection coated normal incidence laser facets. In this paper, we report on the use of angle-facet tapered laser amplifiers to produce multi-watts of optical power in a near ideal diffraction-limited beam. Previous work on tapered angled facet amplifiers [5] has been geared toward low power operation. When combined with a dissipating grid on the unpumped region of the amplifier, the angled-facet structure leads to several new advantages for high power applications. These include: (i) a reduction of the effective reflectivity which results in less gain competition with the forward propagating signal, (ii) a reduction of filamentation formation, and (iii) a reduction of the reflected amplified signal at the input facet, which increases the catastrophic optical damage threshold. Angled facets can also be used in combination with anti-reflection coatings, easing the stringent requirements on the anti-reflection coating. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
