Title :
Alignment monitoring of the pulse carver and data modulator for RZ-DPSK systems
Author :
Kim, Hoon ; Doerr, C.R. ; Pafchek, R. ; Stulz, L.W. ; Bernasconi, P.
Author_Institution :
Bell Labs., Holmdel, NJ, USA
Abstract :
A novel technique for monitoring the alignment status between the pulse carver and data modulator for return-to-zero differential phase-shift keying systems is proposed and demonstrated. The proposed technique utilizes a polarization-maintaining fiber, polarizer, and power meter. Both the simulation and measurement results show that the proposed technique can monitor the bit-error-rate degradation caused by timing misalignment between the pulse carver and data modulator.
Keywords :
differential phase shift keying; electro-optical modulation; error statistics; intensity modulation; optical fibre communication; optical fibre polarisation; optical polarisers; optical transmitters; phase modulation; RZ-DPSK systems; RZ-DPSK transmitter; alignment monitoring; bit-error-rate degradation; data modulator; intensity modulator; phase modulator; polarization-maintaining fiber; polarizer; power meter; pulse carver; return-to-zero differential phase-shift keying systems; timing misalignment; Fiber nonlinear optics; Monitoring; Nonlinear optics; Optical modulation; Optical pulses; Optical receivers; Optical sensors; Optical transmitters; Polarization; Pulse modulation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.818654
