Coherent (COHR) : Anyone else holding? Message Board

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Biotech / Medical : Coherent (COHR) : Anyone else holding?

COHR 131.96

-0.6%

Oct 31 9:30 AM EDT

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To: Rob-Chemist who wrote (712)	1/13/2000 5:18:00 AM
From: JDN	Read Replies (1) of 788

Dear Rob-Chemist: Why dont you go to their 10-k which is on EDGAR? Here is a little excerpt I lifted from it which might wet yours or others appetites. JDN In 1999, CLG announced a new 980-nm Optically Pumped Semiconductor (OPS) laser technology that provides the highest power 980-nm laser output from a single-mode device. High-power 980 nm is critical for pumping Erbium-doped Fiber Amplifiers (EDFAs)--key components in Dense Wavelength Division Multiplexed (DWDM) telecommunication systems. EDFAs are used to boost optical telecommunications signals that have degraded after being transported over long distances. Amplifiers for DWDM networks require higher pump-powers as the number of wavelengths transmitted through the system is increased. Current 980 nm pump lasers are fundamentally limited to less than 200 mW (technology limit) necessitating the "ganging" of several pump lasers with complex schemes to provide adequate pump power for wide-bandwidth, high-gain DWDM telecommunications systems.

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