OZ Optics MBC-PDBC Modulator Bias Controller User manual

Brand
OZ Optics
Model
MBC-PDBC Modulator Bias Controller
Type
User manual
1
DTS0171 OZ Optics reserves the right to change any specifications without prior notice. 8 January 2021
PRELIMINARY
Product Description
The Precision Ditherless Bias Controller is an OEM
version standalone device for bias control in a feed-
back loop. The most important feature is its use of pi-
lot tone mode to accurately bring the modulator to the
Quad position, followed by the use of ditherless mode
to continue locking the modulator at that point. The
user can also disable the pilot tone and use the manual mode
to lock the bias of the modulator or the device under control to
another desired working point. The locking slope can be switched
with a jumper on the board. When the modulator drifts out of the
specified range, the unit will pull the bias back to the desired work-
ing point. There are two built-in photodiodes on the board. An ex-
ternal reference voltage can also be applied when specified at
the time of order. There is a port for the user to tune the Bias
Controller by applying an external voltage when it is set to the
manual mode.
Features
• Compact
• Ditherless, no. pilot tone
• High dynamic range, high accuracy
• Usable with Mach-Zehnder (MZ) modulator
• Usable for Fabry-Perot fiber control loop-back
• Fast response
• Tunable
• Alarming LED for overtuning
• Automatically lock to quad precisely then enter
into ditherless mode
MODULATOR BIAS CONTROLLER - PRECISION DITHERLESS
MBC-PDBC
Specifications
Parameters Min. Typ. Max.
Input Signal Current (mA) 0.1 x 10-3 0.1
Input Optical Power (dBm) -30 -10
Locking Accuracy (Degrees) 1.6 2
DC Bias Voltage (V) -10 +10
Modulation Depth (%) (During
calibration or resetting only, it
is off during normal operation) 6
Pilot Tone Frequency (Hz) 1K
Positive Power Supply (V) 10 12 +15
Negative Power Supply (V) -10 -12 -15
Positive Supply Current (mA) 120
Negative Supply Current (mA) 90
Operating Temperature (°C) 0–70
Storage Temperature (°C) -40–80
Dimension L x W x H (inch) 3.3 x 2.2 x 0.5
2
DC Bias
CW Laser
PD-2 Bias control output
MZ Modulator
GND
PD-1
5% coupler
1% coupler
GND
Precision
Ditherless BC
PM
Precision
Ditherless BC
DC
RF
CW Laser
PD-2 Bias control
output
MZ Modulator
RND
PD-1
1% coupler
1% coupler
DC Bias
CW Laser
PD-2 Bias control
output
Fabry-Perot Tunable Filter
GND
PD-1
5% coupler
1% coupler
GND
Precision
Ditherless BC
PM
Figure 2. Configuration of Precision Ditherless BC for MZ modulator with one putput
Figure 1. Configuration of Precision Ditherless BC for modulation with complimentary outputs
Figure 3. Configuration of Precision Ditherless BC for FP Tunable Filter
(The 5% coupling ratio may change depending on the insertion loss of FP tunable filter)
Part Number MBC-PDBC-X
X = Connector code:
3U = FC/UPC
3A = FC/APC
SCU = SC/UPC
SCA = SC/APC
LCU = LC/UPC
LCA = LC/APC
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OZ Optics MBC-PDBC Modulator Bias Controller User manual

Brand
OZ Optics
Model
MBC-PDBC Modulator Bias Controller
Type
User manual
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