
Evolving SAN, GbE/10GbE, and Metro Ethernet Technologies ◾ 241
speed. Fabry–Perot (FP) laser diodes are relatively inexpensive and are typically used for single-mode
transmission at 1310 nm. DFB laser diodes are most expensive and are used for single-mode trans-
mission at 1550 nm. VCSEL is now popular for GbE operation at 850 nm. To give a rough view of
the relative costs involved with these transmitters at press time, the original equipment manufacturer
(OEM) cost in volume of an LED transmitter/receiver (transceiver) component is about $20; an FP
laser transceiver, $100; a DFB laser, $600; and a gigabit VCSEL, $70 [BIR200601]. e receivers ...