Invention Grant
US09523867B2 Off quadrature biasing of Mach Zehnder modulator for improved OSNR performance 有权
马赫曾德调制器的正交偏置关闭,以提高OSNR性能

Off quadrature biasing of Mach Zehnder modulator for improved OSNR performance
Abstract:
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.
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