26 April 1995 Frequency stabilization and channel identification for dense wavelength-division-multiplexing (WDM) fiber optic transmission systems
Author Affiliations +
Abstract
A dense WDM transmission system is promising for high-capacity fiber optic links. In a dense WDM system with a moderate number of channels, the total wavelength range can be within the discrete/continuous tuning range of multisection DBR lasers. Therefore, a laser array consisting of laser diodes with the same nominal wavelength can be used. In this paper, we propose a new frequency stabilization and channel identification technique for dense WDM transmission systems. The laser diodes on the transmitter side are frequency modulated by sinusoidal signals that are used as pilot tones for channel identification on the receiver side. Depending on the difference between the optical filter's central frequency and the received optical signal frequency, the filter output can be the sinusoidal signal itself or its second harmonic. We use a nonlinear electronic circuit and a phase-locked loop to regenerate the sinusoidal signal. This provides a reliable source for channel identification. Meanwhile, there is no need to modulate the optical filter central-frequency to lock it to the received signal since the received signal is already frequency-dithered and the sinusoidal signal is recovered on the receiver side. This eliminates the power penalty due to frequency-dither of the optical filter.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mohsen Kavehrad, Mohsen Kavehrad, Quan Jiang, Quan Jiang, } "Frequency stabilization and channel identification for dense wavelength-division-multiplexing (WDM) fiber optic transmission systems", Proc. SPIE 2378, Laser Frequency Stabilization and Noise Reduction, (26 April 1995); doi: 10.1117/12.208242; https://doi.org/10.1117/12.208242
PROCEEDINGS
4 PAGES


SHARE
RELATED CONTENT

Spectral mode splitting scheme application to 40 Gbit s...
Proceedings of SPIE (August 18 2003)
100G and beyond: optical transmission activities in Brazil
Proceedings of SPIE (January 24 2012)
4 channel, 662 Mb s medium density WDM system with...
Proceedings of SPIE (December 31 1990)
Fiber Optic Transversal Filters for RF Direction Finding
Proceedings of SPIE (November 18 1985)
Methodology for testing WDM laser arrays
Proceedings of SPIE (April 30 1996)
Frequency-stable semiconductor laser for DWDM
Proceedings of SPIE (May 21 2002)

Back to Top