Optical DWDM spectrum analyzer BaySpec

The BaySpec’s CWDM Series Optical Spectrum Analyzer (OSA) is an embedded, integrated monitor that delivers precise measurement and powerful processing capabilities to coarse wavelength division multiplexing (CWDM) applications compliant with the ITU-T G.695 standard.

Coarse Wave Division Multiplexing (CWDM) combines up to 18 wavelengths onto a single fiber. CWDM technology uses ITU standard 20nm spacing between the wavelengths, from 1310nm to 1610nm. High reliability (GR-1209/1221 qualified) is achieved through a rugged mechanical design with no moving parts. Periodic calibration is not required. Input/Output (I/O) is provided through a dual port RAM interface accessed through ADD/DAT bus direct connection or serial (RS232 or USB) communications.

The CWDM OSA Series employs a highly efficient Volume Phase Grating (VPG) as the spectral dispersion element and an ultra sensitive InGaAs array detector as the detection element, thereby providing high-speed parallel processing and continuous spectrum measurements. As an input, the device uses a tapped signal from the main data transmission link through a single mode fiber, then collimating it with a micro lens. The signal is spectrally dispersed with the VPGâ, and the diffracted field is focused onto an InGaAs array detector. The control electronics read out the processed digital signal to extract required information. Both the raw data and the processed data are available to the host through the supported interfaces.

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