✦ LIBER ✦
Efficient intensity modulation due to surface acoustic waves on windows of the AlGaN/InGaN multiple quantum well laser
✍ Scribed by S.M. Abrarov; T.W. Kang; T.W. Kim
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 379 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0030-3992
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✦ Synopsis
An alternative method for modulation of light generated by AlGaN/InGaN multiple quantum well laser with quartz antire ective (AR) coatings covering the resonator windows was modelled and studied theoretically. Disturbance of the piezoelectric coatings caused by surface acoustic waves (SAW) results in e cient intensity modulation of the laser beam. The model for the laser diode operating at DC demonstrates that the modulation factor can exceed 0.2 in sub-nanometer SAW displacement. For quarter-wave AR ÿlms, the carrier frequency of modulated beam has twice the frequency of SAW.