Fremont, CA, March
15, 2003 - Optoplex Corporation
today announced that it has successfully expanded the
interleaver product
lines by adding new variations and features to its product
portfolio which already consists of products with channel
spacing ranging from 400 to 12.5 GHz. Optoplex’s
interleaver product family has been fully qualified per
Telcordia GR-1221 and GR-63 Standards.
The new products announced include super-band
interleaver, sub-band (colorless) demux and tunable interleaver.
Super-band Interleaver
A new generation of design capable of producing both ultra-wide
passband and ultra-wide stopband with a step-function
like transition between the bands. This new design has
the following applications.
1. The device can be used to interleave
banded channels. By using this Super-band interleaver,
one can achieve 4-skip-0 banded demultiplexing architecture
without using expansive bandpass filters while improving
performance and lower overall system cost and complexity.
(E.g.: A typical 32-channel TFF-based demux’s insertion
loss would be improved from 6.5 dB to 5.5 dB and insertion
loss uniformity improved from 4.5 dB to 2.5 dB without
any cost increase).
2. Particularly suitable for narrower
channel (25 or 12.5 GHz) application. Since for such narrow
channel spacing, passband and stopband have to be at least
60% of FSR in order to have sufficient signal bandwidth
and channel isolation. It is not possible for any of the
current interleaver technologies to achieve such performances.
3. The sharp transition edge can be utilized
as a Skip-0 edge filter. Today’s best edge filter
has at least 3-nm transition range which is equivalent
to four 100-GHz or eight 50-GHz channels. This prohibits
the use of edge filters in mux/demux devices without sacrificing
communication channels.
Sub-band (colorless) Demux
Sub-band (colorless) demux can separate (demultiplexing)
ANY 4 or 8 contiguous channels without active tuning and
is particularly useful in conjunction with Optoplex’s
banded tunable filter or OADM (see news dated Nov. 7,
2002).
Tunable Interleaver
A tunable interleaver has movable passbands and stopbands
while its free spectral range (FSR) and spectral shape
are maintained constant. Tuning is achieved without any
internal moving parts and by a simple user- friendly electronics
interface.
