Zero chirp operation across C-Band is reported for a 10 Gb/s zero-chirp MQW InP Mach-Zehnder modulator. The optimized design ensures low residual chirp over all wavelengths, confirmed by symmetric OSNR penalty measurements.
The performance of InP modulators is investigated for duobinary and differential phase-shift key transmission. We demonstrate that despite nonlinear phase-voltage characteristics and residual absorption, InP devices give excellent performance comparable to ideal Mach-Zehnder modulators. 02005 Optical Society of America OCIS codes: (060.2330) Fiber optics communications (250.7360) Photonic integrated circuits
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