| 摘要 |
An optical modulation source provides a pulsed optical signal 44 by coupling a pulsed optical pump signal 13 polarized along one axis of a polarization preserving fiber 24 having a wavelength lambda p and a continuous-wave (CW) probe signal 54 polarized partially along the pump polarization axis having the desired output wavelength lambda s provided by a laser 52, into one end 22 of a polarization preserving fiber 24. The pump signal is decoupled at the output end 26 of the fiber 24 and used to drive the laser 52 which provides the CW probe signal 54. The pulsed pump signal 13, when present, changes the polarization of the probe signal 54 by the optical Kerr effect. The probe signal is decoupled at the output end 26 of the fiber 24 and passed through an analyzer 38 yielding an output probe signal 44 which exists only when the pump signal is present (or alternatively, when absent), thereby providing a probe signal 44 having a wavelength lambda s of the probe signal and a pulse rate (1/T) of the pump signal.
|
