PD-LD is now offering its next generation of WDM style bi-directional transmitter and receiver modules operating in the 1310 and 1550nm optical windows. These devices are designed to simultaneously transmit and receive over a single optical fiber at frequencies from 10 to 1.25GBs. Dual wavelength bi-directional modules replace the need for a single mode fiber coupled laser diode, a fiber coupled InGaAs PIN-TIA, a discreet fiber optic WDM and a second stage optical isolator. The bi-directional modules combine all of these optical functions and relieve the user of having to fusion splice several discreet units together and then squeeze them onto their PCB.
These small , compact modules require minimal board real estate and when used in pairs deliver full duplex operation of a single 9/125um optical fiber with crosstalk of <-45dB.
The PD-LD product incorporates low threshold current, high differential quantum efficiency MQW(Multiple Quantum Well) FP semiconductor lasers whose typical total operating currents are less than 30mA. Customers may also request DFB lasers.
The receiver section offers an 1200 MHz bandwidth PIN TIA component that is ideal for digital differential operation. These receivers deliver typically –26 dBm optical sensitivity at a BER of 10-10 at OC-24 operation. AGC allows for high optical input power.
PD-LD’s bi-directional WDM modules are built to meet the demanding requirements for optical networking.