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A semiconductor laser with a Michelson interferometer type cavity was electrically tuned by pumping each of its two branches separately. Two tuning modes were observed, small continuous tuning over 2.5 to 3 ? and step tuning with a total shift of 34 ?.
A GaAs/GaAlAs interference laser with an active and a passive section is reported. A very clean single longitudinal mode is obtained and maintained without mode hopping over about 10?C, which results from the combined effect of interference and real index waveguiding in the lateral direction.
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