FSK

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FSK

abbreviation for forskolin.
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Such a small power penalty could largely be attributed to chromatic dispersion, however the constant performance of the downstream signal clearly illustrate the applicability of such a cost effective DPSK transmitter for implementation in future WDM-PONs.
Chang ; "A Bi-directional Radio-over-Fiber System with All-optical Up-converted DPSK for Downstream and Re-modulated OOK for Upstream" ,LEOS .
During the quarter, we continued to build momentum for our 40G TIAs and 100G MZM optical driver devices by securing design wins at a number of Tier 1 customers and we were pleased to announce a $750,000 purchase order for our 100G quad driver, which we expect to ship in the second and third quarters of 2011, and started shipments of the first-ever TFPS modulators, initially with the 40G DPSK TFPS MZMs for evaluation by large number of Tier 1 telecom customers.
As can been seen, 2 -POLSK modulated optical signal spectrum is narrower than NRZ-- DPSK and NRZ--OOK modulated signal spectrum.
Different modulation formats (NRZ-- DPSK, NRZ--OOK, 2--POLSK) are applied for optical signals in each transmission channel.
According to LightCounting, an optical communications market research company, 40-Gbps DPSK modules have played a significant role in growing the DWDM market segment by more than 40 percent in 2010.
40G Bundled Solution: The LX8401, a DPSK TFPS[TM] optical modulator with low drive voltage in a small form factor designed for long-haul and ultra-long-haul optical transponders
Furthermore, we plan to bring our full family of modulator chips to production at IMT to address various modulation formats, such as 40G DPSK, 40G RZ-DQPSK and 100G DP-QPSK being demanded by the telecom communication market.
For this reason, the Opnext 40G DQPSK MSA module is being widely adopted and implemented by our system vendor customers in addition to our successful Opnext DPSK module.
The 40G product offering spans from 40G VSR, 300-pin MSA transceivers that offer compact size and reduced power dissipation for high density platform applications to 40G DPSK and DQPSK transponders for metro, regional and long haul applications.
GigOptix is now very well positioned to benefit from the clear market demand for more bandwidth based on not only our broad portfolio of production ready 40G solutions including not only the GX6261 driver, but also our GX3440 40G DPSK receiver amplifier and GX3240 and GX3220 40G DQPSK receiver amplifiers but also our product portfolio for 100G applications.
The LX8900 is a serial 100G DPSK (Differential Phase Shift Keying) Mach-Zehnder (MZ) modulator implemented using GigOptix' proprietary TFPS[TM] technology.