OFF QUADRATURE BIASING OF MACH ZEHNDER MODULATOR FOR IMPROVED OSNR PERFORMANCE

摘要

An integrated optical modulator device. The device can include a driver module coupled to an optical modulator. The optical modulator is characterized by a raised cosine transfer function. This optical modulator can be coupled to a light source and a bias control module, which is configured to apply an off-quadrature bias to the optical modulator. This bias can be accomplished by applying an inverse of the modulator transfer function to the optical modulator in order to minimize a noise variance. This compression function can result in an optimized increased top eye opening for a signal associated with the optical modulator. Furthermore, the optical modulator can be coupled to an EDFA (Erbium Doped Fiber Amplifier) that is coupled to a filter coupled an O/E (Optical-to-Electrical) receiver.

主权项

1. A hybrid communication module comprising:
a silicon substrate having a first region and a second region; a communication bus configured between the first region and the second region; a silicon photonic device overlaying the first region of the substrate, the silicon photonic device comprising an optical modulator and a light source, the optical modulator being characterized by a raised sine transfer function, the optical modulator including an input coupled to a bias control signal; and an electrical silicon device overlaying the second region of the substrate, the electrical silicon device comprising a bias control circuit coupled to the optical modulator via the communication bus, the bias control circuit being configured to generate the bias signal for minimizing a noise variance that is proportional to 2√{square root over (nΔPASE)}, wherein nΔ is a signal level n and PASE is an Amplified Spontaneous Emission Power.