Singlemode operation with an output power of up to 100 mW is reported for the first time for InGaAsP/InP DBR lasers. These devices exhibiting a record 17 nm tuning range, have been realised using a three-step MOVPE process. The output power variations under tuning are limited to ~1.5 dB, and the tuning range remains quasi-constant with output power.
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Delorme et al. (1997) studied this question.
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