Ultra-wide bandwidth, low voltage, and chirp-free optical intensity modulator: design and performance analysis

A novel wavelength-selective InGaAs/InP coupled asymmetric quantum well electrorefraction type optical intensity modulator is proposed. The device is based on contradirectional exchange Bragg grating coupled-waveguide structure, which avoids the use of an interferometer. For a non-optimized device the bandwidth is 111 GHz at 1.67 V and it is chirp-free. The device can be integrated with lasers, optical amplifiers, photodetectors etc. It can also be integrated in tandem.