| Autor: |
W.P. Risk, W. J. Kozlovsky, W. Lenth, S.D. Lau, G.L. Bona, H. Jaeckel, D.J. Webb |
| Rok vydání: |
1993 |
| Zdroj: |
Compact Blue-Green Lasers. |
| Popis: |
There is currently considerable research on compact blue light sources that use periodically-poled waveguides for quasi-phasematched frequency doubling of GaAlAs laser diodes.1,2 For such devices to become practical, they must be configured in such a way that optical feedback from the SHG waveguide or the other optical elements does not adversely affect the spectral characteristics or increase the amplitude noise of the diode laser. Although optical isolators can be used to reduce feedback, this approach does not lend itself to miniaturization of such devices. A more attractive alternative is the use of a configuration that includes the frequency doubling waveguide and all other optical elements within an "extended" laser cavity. In this configuration, lasing due to the reflectivity of the diode laser output facet is suppressed by antireflection (AR) coating, and strong feedback is intentionally provided by an external mirror or grating to produce laser oscillation. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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