QAM Emulator0 pages

QAM Emulator
The device is a 3-path interference with 500ps delay between each arm. The interferometer may be used to emulate QAM 16
and QAM 64 respectively on first and second outputs from a PM QPSK input signal. This delay is customizable at the order. A
stable fine phase tuning system is implemented enabling a perfect control of the phase of the constellation .

500 ps
PMF output

tunable coupler*

QAM16

500 ps

QPSK

PMF input

PMF output

QAM64

Switch

tunable coupler

Phase tuning element

Parameter

unit

QAM

Frequency range

THz

191 to 197

Fiber type

PM Panda 900μm coreguide

Excess IL path#1 (output QAM64
only)

dB

2.0

Excess IL path#2

dB

3.0

Excess IL path#3

dB

4.0

Path difference first stage

ps

500

Path difference snd stage

ps

500

Path delay precision

%

1

mW

300

Pow Balancing controllers Qty
Max optical power
Phase control

2

unit

Low Voltage (L)

s

1.0

deg

> 360

tuning voltage

V

0 to 4

power consumption

W

< 0.5

tuning time constant [0% to 50%]
tuning range

ordering information
Input
connector
QAM64

-

Output
connector

/
FCUPC
FCAPC
SCUPC
SCAPC
LC

FCUPC
FCAPC
SCUPC
SCAPC
LC

rev 2.00