X5 AND Z5 MODULATOR
4
Specifications
Parameter
Chirp (alpha parameter)
Optical insertion loss (BOL)
1
Optical return loss (input and output ports)
Optical on/off extinction ratio
Low frequency
PRBS
2
E/O bandwidth (-3 dB electrical, linear fit 2 to 15 GHz)
S11 (130 MHz to 10 GHz)
Drive voltage (RF port)
3
Vπ bias port at 40 kHz
Bias voltage range
4
RF port resistance (DC)
Bias port resistance (DC)
Photodetector extinction ratio
5
Photodetector O/E bandwidth
Photodetector responsivity (referenced to output power)
Photodetector phase tracking error
6
Photodetector dark current (at -5 V, room temperature)
∆R/∆T
7
∆R/∆λ
8
Typical
Typical
Typical
Typical
Typical
Typical
Typical
Typical
Typical
Typical
Typical
Typical
Typical
Typical
Typical
Typical
Typical
Typical
X5
0
4.5 dB
40 dB
27 dB
15 dB
12 GHz
10 dB
5.5 V
4V
-15 to 15 V
40
Ω
1 MΩ
6 dB
100 kHz
20 mA/W
-5 to 5°
5 nA
±0.2 dB
±0.3 dB
Z5
±0.7
4.5 V
2.5 V
1. Measured at peak of DC bias transmission with no RF input and no optical connectors.
2. For PRBS signals of up to 2
31
-1 and bit rates up to 12.5 Gb/s. Measurement is based on an optimized test set up.
3. Maximum driving voltage required to achieve 15 dB ER for 12.5 Gb/s 2
31
-1 PRBS signal over the operating wavelength and temperature ranges.
4. Maximum voltage range required to maintain optimum bias point over life and temperature.
5. ER = 10*log(I
max
/I
min
): I
max
= PD current with modulator biased to maximum output power, I
min
= PD current with modulator biased to minimum output power.
6. Tracking error is the difference in phase between the modulator output power transfer function and the photodetector output current transfer function.
7. The change in responsivity with temperature can be improved from the values given by employing passive thermal compensation.
8. Over C or L band. This can be calibrated for a given laser frequency.
JDSU [ JDS UNIPHASE CORPORATION ]
