boards inside the transmission equipment rack the height of the transceiver
module for the OLT had to be 8.5 mm or less, conforming to the transceiver
size for the standard full-service access network ATM-PON. The LC- or SC-type
pigtail was adopted as the optical connector termination.
In GE-PON, the OLT needs a DFB laser having a 1490-nm single longitu-
dinal mode wavelength with high output power. For this reason, in the OSA a
TO-CAN package was adopted as the transmitting laser and a high coupling
efficiency design was adopted using an aspheric lens. The receiver side had the
same structure as the OSA for ONU, having a fiber with WDM filter, receiving
PD, and receiving amplifier with a passive alignment assembly in a plastic
package. The receiving ...