title: Effect of phase noise in linear modulator systems.
abstract: Measurements of noise levels with semiconductor lasers and long lengths of polarization-preserving fiber, as used in typical linear modulator systems, show noise levels that are ~ 10 dB above thermal noise because of laser phase-to-intensity noise conversion. Data are presented for several launching angles into both polarization-preserving and polarizing fiber. There is good agreement with theory for the variation in noise with an output analyzer angle. To reduce the noise either a single frequency source must be used or the polarization-preserving fiber must be replaced by a conventional single-mode fiber.
authors: C H
authors: CH
authors: Bulmer
authors: R P
authors: RP
authors: Moeller
authors: W K
authors: WK
authors: Burns