A Widely-Tunable High-SMSR Narrow-Linewidth Laser Heterogeneously Integrated on Silicon

A heterogeneously-integrated widely-tunable semiconductor laser utilizing unbalanced MZI filter assisted Vernier ring resonators is demonstrated. A wavelength tuning range of 55 nm, SMSR greater than 50 dB and spectral linewidth of 50–85 kHz over this range was achieved.

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