Tsunami Optics this week announced four new metro optical access products designed to enable service providers to reduce the cost of provisioning high-bandwidth services to companies.
The new products are an integrated four-channel coarse wavelength division multiplexing mux/demux, an eight-channel CWDM multiplexer, an eight-channel demultiplexer, and a group of CWDM add/drop modules that can add and drop up to four wavelengths per fibre. CWDM reduces the cost of provisioning optical access services because it uses uncooled lasers, rather than the cooled lasers used in dense WDM (DWDM) systems. Cooling lasers are not required in CWDM because wavelengths are spaced farther apart on a fibre.
Tsunami's four-channel mux/demux is called the MetroChannel I-4. It couples a multiplexer and demultiplexer into one module, and can either combine up to four wavelengths onto one single-mode fibre or separate four wavelengths onto separate fibres.
Each wavelength operates with 20-nanometre separation to prevent cross-talk, and is protocol and bit rate-independent, Tsunami says.
The two eight-channel products -- the MetroChannel M-8 multiplexer and D-8 demultiplexer- - are separate modules that combine or separate eight wavelengths onto a single-mode fibre. Like the I-4, the M-8 and D-8 are bit rate and protocol-independent and operate with wavelengths spaced 20 nm apart.
Lastly, the MetroChannels AD-1, AD-2, AD-3 and AD-4 are coarse wavelength optical add/drop modules (OADM) that can add and drop one, two, three or four wavelengths onto a single-mode fibre. The OADMs also operate with the same 20 nm spacing between wavelengths, and are protocol and bit rate-independent.
The new products are all compliant with Telcordia and Network Equipment Building Systems (NEBS), and support wavelengths from 1471 nm to 1611 nm.
Tsunami says the products were designed to fit into a metro access network that transports bandwidth less than 60 or 70 kilometres. None of the products uses amplification to transport wavelengths, Tsunami says.
Karen Liu, director of optical components at RHK, says the value-proposition Tsunami offers with CWDM technology is the lower cost associated with using uncooled lasers.
"That's the real competitive side of the equation," she said. "Tsunami is the first to develop this kind of product to really help reduce costs. Before this, there was a big jump from a single wavelength system to DWDM. This fits into that gap for both cost and function."
LuxN has a similar offering with its WideWav product line, as does ONI with its Online 2500. Ocular's OSX access switch and Riverstone's RS1600 also have CWDM capabilities. NEC can support CWDM in its MG8000 Gigabit Ethernet multiplexer.
The products are currently shipping with pricing generally starting at $US290 per wavelength, Tsunami said.