BOOKHAM LMC10ZEG3347-J57

Data Sheet
10Gb/s Compact InP MZ Modulator
with DWDM Laser
LMC10ZEG
Zero Chirp - High Power
The LMC10ZEG product, containing the Bookham Ultra High
Power Strained Layer DFB laser chip and Zero chirp InP MZ
modulator, has been specifically designed for use in 10 Gb/s
high performance regional metro and long haul C band
DWDM systems. By co-packaging the laser, locker, modulator,
VOA in a package with the same footprint area as the
industry standard 14-pin, the LMC10 series provides
Mach-Zehnder performance at a price similar to lower
performance alternatives. The internal optical attenuator allow
fibre power stabilisation over life and temperature. The high
output power, integral wavelength locking and high extinction
ratio provides excellent OSNR to allow the device to be
employed on multi-span long haul links.
Features:
• Variable mean modulated optical power range of
0 to -10dBm
• Zero Chirp +/-0.2 alpha
• Co-planar differential RF drive ≤3.0 volts
• Suitable for 50GHz ITU applications with +/-20pm λ
accuracy over life
• Low Power Dissipation
• Industry Standard 14-pin footprint area
• Pins on one side to allow increased system density
• Unrivalled performance vs size
• Integrated VOA
• Qualified to Telcordia GR-468 CORE
• RoHS 5/6 compliant
Applications:
• Long Haul DWDM multi-span dispersion
compensated links
• Regional Metro single spans with no
dispersion compensation
1
Data Sheet
Using the LMC10ZEG
The recommended operational conditions for the LMC10ZEG are as follows:
MZ modulator arm DC bias conditions are set at start of life (SOL), (dynamic MZ DC bias control loops are not required).
The VOA can be used in a control loop to set the start of life optical output power.
Characteristics
Parameter
Conditions
Min
Typ
Max
Unit
Case temperature (Tcase)
external temp. of Tx case [1]
0
70
°C
Modulated output power
EOL over temperature [2]
0
7.5
dBm
Modulated optical power
EOL over temperature
-10
dBm
Output power variation
over case temperature
EOL
0.5
dB
AC extinction ratio (unfiltered)
EOL, 10.709Gb/s
[5]
11
dB
AC extinction ratio (filtered)
EOL, 10.709Gb/s [5]
10
dB
Dispersion penalty SOL
[6]
1.2
dB
Dispersion penalty EOL
[6]
1.8
dB
Data bar arm bias
<9mA arm bias current
-3.3
-1
V
Data arm bias
<9mA arm bias current
-3.3
-1
V
Modulation drive voltage
per arm, pk-pk, 10.709Gb/s [7]
1.5
3
V
Optical rise time, fall time
20% - 80%
35
ps
Tolerable link optical reflection
[8]
-14
dB
Output optical return loss
[9]
20
Optical crossing level
[10]
47
Modulator bandwidth
S21, -3dB
Module and Modulator Parameters
Modulator chirp alpha parameter
2
[3]
-1.5
[4]
[11]
dB
53
10
-0.2
%
GHz
0.2
Data Sheet
Characteristics (continued)
Parameter
Conditions
Min
Typ
Max
Unit
290
mA
Laser Source Parameters
Laser forward current EOL
Wavelength locked
Change in forward laser current EOL
-30
30
mA
Laser threshold current EOL
20
85
mA
Variation in laser wavelength with
submount temp.
90
110
pm/°C
2
V
20
MHz
Laser forward voltage
EOL at locked wavelength
Laser linewidth
CW FWHM
Side mode suppression ratio (SMSR)
[13]
Average relative intensity noise (RIN)
At locked wavelength
40
50
200MHz to 8GHz
Laser modulation bandwidth
Parameter
5
dB
-140
1
Conditions
dB/Hz
MHz
Min
Typ
Max
Unit
3825
3864
3902
K
8069
Ohms
TEC and Thermal Parameters
Thermistor 0/50 beta coefficient
4500
Thermistor resistance
For locked wavelength [12]
TEC current
EOL, T Case = 70°C
1.1
A
TEC voltage
EOL, T Case = 70°C
3
V
Module power dissipation
EOL, T Case = 70°C
4
W
Max
Unit
Parameter
Conditions
Min
Typ
Etalon photocurrent at locked wavelength
EOL
0.08
1.3
mA
Reference photocurrent at locked wavelength
EOL
0.08
1.7
mA
Etalon slope at locking point
EOL
0.3
7
uA/pm
Reference slope at locked wavelength
EOL
0.1
3
uA/pm
Etalon / reference current ratio at locking point
[14]
0.2
2
ratio
Wavelength accuracy over life and temperature
[15]
-20
20
pm
Temperature coefficient of the wavelength locker
[16]
Wavelength Locker Parameters
Photodiode reverse bias voltage
9.6
4.75
5
Photodiode dark current EOL
Laser drive current tuning coefficient
3
[17]
3
4
pm/°C
5.25
V
100
nA
7
pm/mA
Data Sheet
Characteristics (continued)
Parameter
Conditions
Min
Typ
Max
Unit
320
mW
0
V
40
mA
VOA Parameters
VOA power dissipation
(18)
VOA bias voltage
(18)
VOA photocurrent
(18)
-8
S11 Test Mask
Mag S11
Mag
S11(dB)
[dB]
S11 Test Mask
Frequency (GHz)
4
Data Sheet
Glossary
BFM
Back Facet Monitor diode
MZ
Mach-Zehnder interferometer
CW
Continuous wave
SOL
Start of life
EOL
End of life
Tcase
Case temperature
FWHM
Full width half maximum
Pk-pk
Peak to peak
Notes to Characteristic Tables
[1] Refer to Bookham applications document AN0117 for
Tx case temperature measurement definition.
[2] Specified range over life. Integral VOA set to minimum
attenuation.
[3] Specified range over life. Integral VOA set to maximum
attenuation.
[4] Optical power variation over the operational case
temperature range of the Tx relative to 30C. Improved
power tracking can be achieved by implementing closed
loop power control using an external fiber power monitor
and the LMC10ZEG variable optical attenuator.
[5] Measurement of AC extinction ratio is to be referenced to
a Tektronix CSA8000B with 80C08C plug-in module.
Test conditions: 10.709Gb/s, 223-1 PRBS NRZ
sequence, 4th order Bessel-Thomson filter [where
specified]. EOL condition includes variations in ER over
the optical power range.
[6] Measured with +/-800ps/nm chromatic dispersion, ITU-T
G652 optical fibre, 10.709Gb/s, 223-1 PRBS NRZ
sequence. The penalty calculation is made at a BER level
of 10 -10. RX OSNR > 30dB (35dB target), RBW of 0.1nm.
The device is driven directly from a pattern generator.
Receiver decision point self optimised for amplitude and
phase.
[7] The differential modulation voltage is the peak to peak
voltage that is required to achieve the required optical
extinction ratio. The voltage and its complement must be
AC coupled to each of the Data and Data-bar pins.
[8] The module is expected to operate without damage into
a -14dB optical return loss equivalent to a fibre to
air interface.
[9] Optical return loss looking back into the LMC10ZEG
averaged over polarisation states.
[10] Set to nominal 50% at SOL, does not include effects of
electrical driver aging.
5
[11] Electro-optic bandwidth. (S21 e/o). This measurement is
made as a small signal measurement on each arm
separately, 3% smoothed.
[12] The thermistor current should not exceed 100 µA to
prevent self-heating effects. The thermistor resistance
varies with temperature according to the
following equation:
The thermistor resistance varies with temperature
according to the following Steinhart-Hart equation,
where C1= 1.2156x10-3, C2= 2.1925x10-4,
C3=1.5241x10-7 for the thermistor type used.
Temperature is required in Kelvin.
[13] Measured at operating laser current Iop and an OSA
resolution of 0.1nm and a span of 10nm centred on the
peak wavelength.
[14] Maintain the start of life locking ratio over life to hold
wavelength constant.
[15] Assumes wavelength is set to ITU wavelength at start of
life, closed loop wavelength control by maintaining
constant locking ratio.
[16] Specified by design, not measured unit to unit.
[17] Wavelength variation with change in laser drive current at
constant temperature.
[18] VOA dissipation, current and voltage limits apply
simultaneously. Do not exceed any one limit.
Refer to applications document AN0141.
Note: AC parameters such as extinction ratio and waveform
crossing may be system dependent.
Data Sheet
Absolute Maximum Ratings
Condition
Min
Storage case temperature
-40
Typ
Laser Current
Laser Voltage
Unit
85
°C
600
mA
-2
MZ modulator voltage (DC)
-12
[1]
MZ modulator arm bias currents (DC)
[2]
Optical attenuator bias voltage (DC) [6]
Optical attenuator bias current (DC)
0
V
mA
-8
V
50
mA
320
mW
-15
0
V
[6]
BFM bias
V
-12
Optical attenuator power dissipation [6]
TEC voltage
[3]
-3
3
V
TEC current
[3]
-1.8
1.8
A
Output optical power (continuous operation)
13
dBm
Lead soldering temperature
260
°C
Fiber bend radius
[5]
[4]
30
Notes:
[1]
[2]
[3]
[4]
[5]
[6]
With CW laser off, do not forward bias the MZ arms.
Do not exceed the MZ and bias control tap maximum currents
Maximum soldering time of 10 seconds, Tx case and fiber must not be subjected to extremes of temperature.
Minimum fiber bend radius of 30mm, fiber may be damaged if exceeded.
Thermistor operating range must not be exceeded.
Optical attenuator voltage and current must be limited to ensure that the maximum power dissipation is not exceeded.
Refer to Bookham applications note AN0141.
ESD Rating
This product is ESD compliant to Class 2 as defined by Telcordia TA-TSY-000870.
ESD precautions must be used when handling this device and are required in both
production and R&D environments.
6
Max
mm
Data Sheet
Schematic Diagram
Pin Out Table
7
Pin #
Function
Pin #
Function
1
Data bias
9
Case ground
2
Data bar bias
10
TEC -
3
VOA
11
TEC +
4
Connect to -5V
12
Laser anode
5
Case ground
13
Thermistor
6
Data bar
14
Etalon BFM anode
7
Case ground
15
BFM common cathode
8
Data
16
Reference BFM anode
Data Sheet
Pin Definitions
Pin1 MZ data DC Bias input and Pin 2 MZ data-bar DC
Bias input.
DC bias voltages for data and data-bar MZ arms. These pins
must be connected to a low noise negative DC voltage,
typically around -2V (WRT case). These voltages are defined
for each Tx in the deliverable data. A precision voltage source
must be used, which is capable of sourcing up to 10mA to
each pin. Refer to Bookham applications note AN0130 for
circuit implementation and filtering suggestions.
Pin 3 VOA control pin.
VOA control pin. A negative DC voltage (WRT case) between
0V to -8V is applied to pin 3 to control the Variable Optical
Attenuator (VOA). The VOA can be used in a control loop with
an external power monitor to provide continuous optical
power out of the optical fiber. Alternatively the VOA can be
used in open loop control, set to a SOL optical power value
with the specified range.
Pin 4 Unused pin.
Unused pin, Recommended that this pin is connected to
-5V nominal.
Pin 5, 7 and 9 Ground.
Package ground connections.
Pin 6 MZ Data-bar modulation input and Pin 8 MZ Data
modulation input.
Operation is typically using differential electrical drive voltages
applied to both the Data and Data-bar MZ modulator inputs.
AC RF coupling must be used.
Pin 10 TEC(-) and Pin 11 TEC(+).
The LMC10 contains a Peltier heatpump. Applying a negative
voltage on Pin 10 with respect to Pin 11 will cause the
internal optics to be cooled relative to the case temperature.
Reversing the applied voltage will cause the internal structure
to be heated. The heatpump must be used in a feedback
controlled circuit in conjunction with the internal thermistor.
8
Pin 12 Laser Anode.
The laser is operated with a forward bias current, the laser
cathode being connected internally to case ground.
Pin 13 Thermistor.
The thermistor is used in the TEC control loop for keeping the
internal temperature at a constant value. It has a nominal
resistance of 10k Ohms at a temperature of 25ºC and is not
polarity sensitive, although one side of the thermistor is
connected to package ground. Operating current should be
limited to less than 100µA to prevent self heating errors. The
exact thermistor value is supplied with each Tx as part of the
deliverable test data to ensure the correct
operating wavelength.
Pin 14 Back Facet Monitor Diode Anode (Etalon).
The signal from this photodiode carries the spectral response
of the wavelength filter.
Pin 15 Back Facet Monitor Diode Common Cathode.
Common connection for the monitor diode cathodes.
Pin 16 Back Facet Monitor Diode Anode (Reference).
The signal from this photodiode is the reference signal and is
proportional to the power emitted from the rear facet of the
laser. The signal from the reference and etalon monitors are
used in a control loop to maintain the wavelength of the laser
at the defined lock point.
Data Sheet
Wavelength Locker for the LMC10ZEG
Lockpoint
The wavelength locker for the LMC10ZEG includes two photodiodes: the Reference photodiode provides a photocurrent
proportional to the laser chip facet power, and the Etalon photodiode provides a photocurrent related to wavelength (frequency).
In order to lock the LMC10ZEG wavelength, a control circuit should be used which maintains the laser submount temperature
constant over life and then controls the wavelength by varying the laser forward current to keep the ratio of the etalon and
reference photodiode currents (Locking Ratio) constant. This may be achieved by keeping the discrimination value (LR x Iref) – Iet)
at zero, where LR is the target Locking Ratio.
Lockpoint
Refer to applications document AN0142 for further information on wavelength locking.
9
Data Sheet
Package Outline Drawing
10
Data Sheet
Typical 10Gb/s Eye Diagram
Test Conditions: 10.709Gb/s 223-1PRBS NRZ data.
Typical Over Fibre Performance (SMF-28)
Test Conditions: 10.709Gb/s 223-1PRBS NRZ data, BER10-12.
11
Data Sheet
LMC10 Mounting Guidelines
The device must be attached to a heat-sink capable of
dissipating a minimum of 4W. The surface of the heat-sink
must be smooth (< 0.8 micron Ra) and flat (< 24.8 microns
over the area and not convex in form). Attachment screws,
thermal interface compounds or interface pads may be used
but must not exert stress upon the device. Refer to Bookham
applications document AN0117.
Note on Maximum Ratings and Handling Precautions
It is the nature of this device that unprotected semi-conductor
junctions are connected directly to external package pins.
Protection of these junctions would have an adverse effect on
the performance of the device or the flexibility in its
application and use. The user is requested to observe the
‘Absolute Minimum and Maximum Ratings’ in order to
prevent damage or destruction of the device. In particular
forward biasing the modulator, attenuator or power monitor
junctions will lead to catastrophic damage if the current or
voltage limits are exceeded. These junctions are also sensitive
to ESD and electrical transients. The laser is similarly sensitive
to reverse bias, ESD and electrical transients. These can lead
to catastrophic device damage. The user is requested to
ensure that operation of any control or bias circuits do not
introduce electrical transients or adverse bias conditions
during switch-on, switch-off or calibration and set-up
routines. Appropriate ESD precautions are required in both
production and R&D environments.
Applications Support
The following application notes are available to support customers using the LMC10ZEG:
Component Mounting Recommendations For the Bookham Technology
LMC10 InP MZ Transmitter Module
AN0117
LMC10 Implementing Dynamic Wavelength Locker Loops For
DWDM Optical Systems
AN0142
Compact LMC10 InP MZ Evaluation Board User Document
AN0130
LMC10ZEG Optical Power Adjustment Using the Integral VOA
AN0141
Recommended RF drivers for the LMC10 Integrated
Optical Transmitter Product Portfolio
AN0137
Optical component evaluation platforms are available for all Bookham optical products.
Contact your regional sales representative for further information.
12
Data Sheet
Deliverable Data
The following deliverable data is provided as a paper copy with each device and
can also be made available as a text file from a customer specific site on
a Bookham server with password protection.
Parameter
Units
Thermistor operating resistance
Ohms
Laser bias current
mA
Wavelength operating
nm
MZ bias data
Volts
MZ bias data-bar
Volts
Locking reference current
mA
Locking etalon current
mA
Locking current ratio
-
Locker slope sign
+ or -
[2]
Laser threshold
mA
MZ drive voltage amplitude
Volts
Wavelength target (ITU-T)
nm
Mean modulated optical power
[1]
Laser current tuning coefficient
pm/mA
BFM reference locker slope
µA/pm
BFM etalon locker slope
µA/pm
Notes:
[1] Mean modulated optical power with integral VOA set to minimum attenuation.
[2] Positive sign indicates etalon photocurrent increasing with wavelength at lock point.
Refer to Bookham applications document AN0142 for locker slope definitions.
AC specified parameters may be derived from DC measurement data.
13
dBm
Data Sheet
RoHS Compliance
Bookham is fully committed to environment
protection and sustainable development and has
set in place a comprehensive program for
removing polluting and hazardous substances from
all of its products. The relevant evidence of RoHS
compliance is held as part of our controlled
documentation for each of our compliant products.
RoHS compliance parts are available to order,
please refer to the ordering information section for
further details.
Ordering Information:
LMC10ZEG
(Wavelength)
****
– (Connector)
J28 = SC/PC
J57 = LC
J59 = MU
**** = last four digits of wavelength value
e.g. for λp=1533.47nm, ****=3347
WDM wavelength range:
C-Band 1528-1565 nm
L-Band 1570-1606 nm
Standard fibre length 1000 +/- 100 mm (blue jacket)
Other connector types are available on request
To order the LMC10 on an evaluation board, please use the prefix
EV in front on the product code e.g. EVLMC10ZEG****-J28
Bookham reserve the right to change without notice.
Contact Information
North America
Bookham Worldwide
Headquarters
Europe
Paignton Office
Asia
Shenzhen Office
2584 Junction Ave.
San Jose
CA 95134
USA
Brixham Road
Paignton
Devon
TQ4 7BE
United Kingdom
2 Phoenix Road
Futian Free Trade Zone
Shenzhen 518038
China
• Tel: +1 408 919 1500
• Tel: +44 (0) 1803 66 2000
• Fax: +1 408 919 6083
• Fax: +44 (0) 1803 66 2801
• Fax: +86 755 33305805
+86 755 33305807
• Tel: +86 755 33305888
Important Notice
Performance figures, data and any illustrative material
provided in this data sheet are typical and must be
specifically confirmed in writing by Bookham before
they become applicable to any particular order or
contract. In accordance with the Bookham policy of
continuous improvement specifications may change
without notice. The publication of information in this
data sheet does not imply freedom from patent or other
protective rights of Bookham or others. Further details
are available from any Bookham sales representative.
www.bookham.com
sales@bookham.com
INVISIBLE LASER RADIATION
DO NOT VIEW DIRECTLY
WITH OPTICAL INSTRUMENTS
CLASS 1M LASER PRODUCT
14
REFERENCE IEC 60825-1 Edition 1.2
MAX POWER < 500mW
WAVELENGTH 1480 - 1620nm
CLASS IIIb LASER PRODUCT
This product complies with
21CFR 1040.10
ISO14001:1996
EMS 504193
TL9000 Rev 3.0 (ISO9001:2000)
FM15040
Caution - use of controls or adjustments or
performance of procedures other than
those specified herein may result in
hazardous radiation exposure.
BH12848 Rev 1.0 January 2007.
©Bookham 2005. Bookham is a registered trademark of Bookham Inc.