lmc10neg Bookham, Inc., lmc10neg Datasheet - Page 5

• Manufacturer Part Number: lmc10neg
• Description: 10gb/s Compact Modulator With Dwdm Laser
• Manufacturer: Bookham, Inc.

5
Glossary
BFM
CW
EOL
FWHM Full width half maximum
MZ
Notes to Characteristic Tables
[1] Refer to Bookham applications document AN0117 for
[2] Power variation over case temperature is measured
[3] Measured reference to a high speed sampling
[4] Measured with 1600ps/nm chromatic dispersion, ITU-T
[5] Measured at the input to the LMC10NEG. Driver
[6] Optical return loss of plant attached to LMC10NEG
[7] Optical return loss looking back into the LMC10NEG
[8] This is a requirement for the crossing control loop over
[9] Assuming 50% crossing level set at start of life. EOL
[10] Slope of the etalon signal can be either positive
Data Sheet
Tx case temperature measurement definition.
reference to 30°C case temperature.
oscilloscope (unfiltered). EOL figure does not include
modulator driver component ageing if applicable.
G652 optical fibre, 10.709Gb/s, 2
sequence. The penalty calculation is made at a BER
level of 10
of 0.1nm using a Bookham standard receiver with
differential drive to modulator. The device is driven
directly from a pattern generator. Receiver decision point
self optimised for amplitude and phase.
selection must take into account modulator driver to
transmitter transmission line losses. Refer to Bookham
applications document AN0137.
fibre connector.
averaged over polarisation, with target value of -27dB.
life and temperature. The accuracy over life and
temperature will be a function of the control loop circuit
design. Reference application note AN0136.
figure does not include modulator driver component
ageing if applicable.
or negative.
Back Facet Monitor diode
Continuous wave
End of life
Mach-Zehnder interferometer
-10.
RX OSNR > 30dB [35dB target], RBW
23
-1 PRBS NRZ
SOL
Tcase
Pk-pk
BCT
[11] Maintain the start of life locking ratio over life to hold
[12] Assumes wavelength is set to ITU wavelength at start of
[13] Wavelength variation with change in laser drive current at
[14] The MZ bias control tap responsivity is bias voltage
[15] The thermistor current should not exceed 100 µA to
Note: AC parameters such as extinction ratio and waveform
wavelength constant.
life, closed loop wavelength control by maintaining
constant locking ratio.
constant temperature.
dependent.
prevent self-heating effects. 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.
crossing may be system dependent.
Start of life
Case temperature
Peak to peak
Bias Control Tap