Optical channel monitoring system with simultaneous C-band...

Details Optical channel monitoring system with simultaneous C-band... Optical channel monitoring system with simultaneous C-band...

2008-03-25

2008-03-25

Lee, John R. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C398S034000

Reexamination Certificate

active

09648263

ABSTRACT:
A monitoring system has the capability to monitor multiple signal bands simultaneously. Specifically, in one embodiment, the monitoring system can simultaneously monitor the C- and L-bands. As a result, the time to scan through the spectral band can be reduced by half. The system comprises a signal source for an optical signal having spectrally separated channels distributed within a first spectral band and a second spectral band. A tunable filter filters this optical signal. A dichroic filter separates the first spectral band from the second spectral band in the optical signal, which has been filtered by the tunable filter. Thereafter, first and second optical detectors detect the respective spectral bands to the filtered optical signal.

REFERENCES:
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patent: 5798855 (1998-08-01), Alexander et al.
patent: 6262822 (2001-07-01), Obhi et al.
patent: 99/34484 (1999-07-01), None
MEM-TUNE Tunable Filter, Preliminary Data Sheet DS00553, May 2000, CoreTek, Inc., 299 Ballardvale Street, Wilmington, MA 01887.
OPM-1 Optical Performance Monitor, Preliminary Data Sheet, DS00555, May 2000, CoreTek, Inc., 299 Ballardvale Street, Wilmington, MA 01887.
Kani, J.; Jinno, M.; Sakamoto, T.; Aisawa, S.; Fukui, M.; Hattori, K.; and Oguchi, K., “Interwavelength-Band Nonlinear Interactions and Their Suppression in Multiwavelength-Band WDM Transmission Systems,” Journal of Lightwave Technology, vol. 17, No. 11, Nov. 1999, pp. 2249-2260.

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