Product category:
Optical Transceivers, Transponders and Repeaters
News Release from: Finisar Corp | Subject: DM80 and DM200 CML Butterfly Transmitter
Edited by the Electronicstalk Editorial
Team on 24 August 2007
Transmitters offer long reach and high
power
The DM80 and DM200 are the world's first narrowly tunable 10Gbit/s transmitters to offer long reach and high output power in a 13-pin butterfly package.
Finisar Corporation has completed Telcordia GR-468 qualification Its 10Gbit/s DM80 and DM200 narrowly tunable CML Butterfly Transmitters for DWDM 300-pin transponders and telecom line card applications are generally available
This article was originally published on Electronicstalk on 13 Nov 2007 at 8.00am (UK)
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Leveraging the directly modulated CML technology recently acquired by Finisar, the DM80 and DM200 are the world's first narrowly tunable 10Gbit/s transmitters to offer long reach and high output power in a 13 pin butterfly package.
Transmission distance and optical output power are important performance parameters of DWDM optical transmitters.
For applications requiring the longest reach, the DM200 transmits with an output power of 0 to 3dBm and can transmit at 10Gbit/s over distances of 300km without requiring costly optical dispersion compensation.
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For applications requiring high output power, the DM80 can transmit distances up to 120km with an output power of 4-7dBm.
Narrow tunability is an important differentiator for OEMs developing transponders for DWDM networks.
A 40-channel DWDM link using single-wavelength transmitters, for example, requires that OEMs keep an inventory of 40 different lasers.
In addition to increased purchasing and inventory management complexity, large numbers of individualised lasers require a longer lead time to replace when inventories run low, forcing OEMs to maintain large component reserves.
Fully tunable transmitters, on the other hand, simplify inventory logistics but command the highest price since it requires the combination of an expensive fully tunable laser source and an external modulator.
Narrowly tunable transmitters offer the best of inventory simplification and lower cost.
Both the DM80 and DM200 transmitters offer narrow tunability at either four-channel, 100GHz DWDM spacing or eight-channel, 50GHz DWDM spacing across both the C-band and L-band, thus reducing the supply chain complexity by a factor of 4x or 8x compared to nontunable sources.
"The production release of the narrowly tunable versions of both DM80 and DM200 shows Finisar's commitment to building on its recent CML technology acquisition", says Dr Frank Fan, Director of Marketing at Finisar.
"As the only company to offer 10Gbit/s long-reach narrow tunability in a standard butterfly box format, Finisar is uniquely positioned to serve the specific needs of the high-end telecom market".
Shipping now, DM80 and DM200 narrowly tunable CML butterfly transmitters are available in production volumes in both four and eight-channel spacing at base frequencies ranging from 186,700GHz to 196,100GHz.
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