Abstract
The first monolithically integrated laser/interferometric modulator is reported. The total chip length of 2.5 mm includes a 970 μm-long strained InGaAs/InGaAsP quantum well gain section, a 230 μm-long wavelength tuning section containing a distributed Bragg reflector grating, and an 800 μm-long active length Mach-Zehnder modulator based on electrorefractive InGaAsP/InP quantum wells. 4 V pushpull drive voltage produces 12.5 dB modulation depth with −9 dBm optical power coupled into a cleaved fibre.
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