鈥?/div>
APPLIED to ONU(OPTICAL NETWORK UNIT) FOR
SINGLE FIBER BI-DIRECTIONAL TRANSMISSION ON
ATM-PON SYSTEM
鈥?INTEGRATED 1.3/1.5碌m WDM FUNCTION BY
碌
EMPLOYING PLC (PLANAR LIGHTWAVE CIRCUIT)
鈥?SINGLE POWER SUPPLY VOLTAGE of +3.3 V
鈥?OPTICAL OUTPUT DEGRADE DETECTION (TX ALM)
鈥?SHUT DOWN FUNCTION (SHUTDOWN)
RECEIVER PART
鈥?622.08 Mb/s CONTINUOUS-MODE RECEIVER
OPERATING AT WAVELENGTH OF 1.5
碌
m
鈥?CLOCK AND DATA RECOVERY FUNCTION BY PLL
CIRCUIT
鈥?OPTICAL INPUT LOSS DETECTION (RX ALM)
TRANSMITTER PART
鈥?155.52 Mb/s BURST-MODE TRANSMITTER
OPERATING at WAVELENGTH of 1.3
碌
m
鈥?INSTANTANEOUS OPERATION FROM THE 1st BIT
OF BURST CELL BY FEED-FORWARD APC CIRCUIT
EMPLOYING ROM
鈥?LASER BIAS CURRENT CONTROL IN BURST-BY-
BURST (BIAS CNT)
BLOCK DIAGRAM
Temp.
Sense
EEP
ROM
LD
Current
Control
Mon.
PD
PLC Module
LD
DATAIN
CLKIN
BIAS CONT
SHUTDOWN
TX ALM
CLKOUT
DATAOUT
D-FF
LD
Driver
1.3
碌m
Alarm
Det.
PLL
D-FF
Alarm
Det.
LIM-
AMP
Pre-AMP
PD
WDM
Fiber
Out
1.5
碌m
RX ALM
Figure 1
California Eastern Laboratories