High power laser band With integrated wavelength monitoring Descr
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Alcatel 1935
High power laser band With integrated wavelength monitoring
Description Alcatel 1935 contains Alcatel SLMQW laser designed with external modulation. This module designed high power DWDM applications with spacing between channels down without using external locker. module integrates wavelength monitoring function order allow wavelength stabilization over product lifetime. Despite this feature, package pinout product stays compatible with previous series (Alcatel 1905LMI) without integrated wavelength monitoring function, order avoid complete redesign existing boards. choice analog output control signal will leave freedom user lock wavelength either with digital analog circuit. module incorporates also polarization maintaining fiber pigtail, thermoelectric cooler, precision thermistor, optical isolator stable operation under conditions.
Features Integrated Fabry-Perot Etalon wavelength monitoring (replaces external lockers) 20mW output power channels spacing available High reliability InGaAsP Buried Ridge Structure laser chip with outstanding long term wavelength stability Optimized with LiNbO3 external modulator Internal optical isolator Internal power monitoring photodiode Polarization Maintaining Fiber pigtail
Applications Ultra Long Haul DWDM SONET/SDH transmission system DWDM submarine terminal Instrumentation
Electro-Optic Characteristics
Parameter Threshold current Optical output power Laser forward voltage Laser forward current (BOL) Laser chip temp. range wavelength tunability Spectral width Side mode suppression Thermistor resistance Thermistor temperature coefficient Relative Intensity Noise TE/fiber Extinction Ratio current Voltage Emitted wavelength drift Tcase Emitted wavelength drift Ilaser Emitted wavelength drift Tlaser Optical isolation Symb. Twave SMSR Conditions Twave= 40°C PF=10mW; PF=20mW; FWHM 25°C @1.2 submount=25 Tcase=70 @1.2 submount=25 Tcase=70 ATC+ACC -0.5 10.3 -140 Units dB/Hz pm/°C pm/mA pm/°C
Note limits start life (except Vt), Tsubmount=25°C, Tcase=25°C, V=-5V Tcase=70°C (for 20mW), Tsubmount=20°C, @1.2 Twave chip temperature required meet target wavelength
Wavelength monitoring section
photodiodes used ensure both optical power monitoring wavelength monitoring. first (power monitoring) referenced monitoring photodiode (PDmon) whereas second (wavelength monitoring) referenced filter photodiode (PDfilt). Symb. Power Monitoring Photodiode current Filter Monitoring photodiode current Filter slope (normalized maximum PDfilt current) Ratio between power monitoring photodiode current filter monitoring photodiode current Photodiodes dark current Photodiodes capacitance Center wavelength Wavelength capture range* Negative capture range Positive capture range Overall wavelength stability over lifetime IPDmon IPDfilt Idark Conditions @P=10mW, =ITU @P=20mW, =ITU @P=10mW, =ITU @P=20mW, =ITU ITU, Unit nm-1
AWC+APC, 0<Tcase<70°C 15years
grid 46.5 46.5 -2.5
Parameter definition capture range spectral area which emitted wavelength before launching mode ensure that when going from mode locked wavelength will targeted wavelength
Fliter Slope (FS)
START
=f(Tsubmount)
Wavelength monitor parameters definition.
Acronyms: APC: Automatic power control (emitted optical power fixed value using power monitoring function laser diode forward current loop variable) ATC: Automatic Temperature laser chip Control AWC: Automatic Wavelength Control ACC: Automatic Current Control
Definitions Twave
Twave submount temperature which laser emission wavelength reaches target wavelength.
Emitted wavelength drift Tcase
Absolute value maximum emitted wavelength deviation unit case temperature (°C) when Tcase varies from operating conditions. Wavelength stabilized through thermal regulation laser chip based thermistor reading.
Emitted wavelength drift Laser Current
Maximum emitted wavelength deviation unit laser current (mA) when output power varies around Pmean.
Absolute maximum ratings
Exposing device stresses above those listed absolute maximum rating could cause permanent damage. Exposure absolute maximum rating conditions extended periods affect device reliability.
Environmental
Parameter Storage temperature Operating temperature (for 10mW 20mW versions) Soldering temperature seconds maximum) Axial force fiber seconds max.) Fiber bend radius applied detector (Pin 4&5) other
Human body model
Unit
2000
Electro-optic
Parameter Laser forward current Laser reverse voltage Photodiode forward current Photodiode reverse voltage Thermistor Voltage Thermistor Current Voltage Current Packing Mounting Torque Unit
Mechanical details dimensions
20.8 Rigid 31,5 1.78 Optical fiber length
maxi
Keyed FC/PC connector
15.2 12.7
12.7
5.95 1.25 1.85 14x(0.5x0.2±0.06) 6x2.54 1.48 17.84
allocation
Description Thermistor Thermistor Laser Diode Cathode Bias Power Monitoring Anode Common Power Monitoring Monitoring Cathode Cooler Cooler Case Ground Case Ground Monitoring Anode Laser Diode Anode Laser Diode Cathode Laser Diode Anode Connect
Pin#1 top-rigth laser module view
Qualification, Reliability Standards
Alcatel Optronics policy products carry complete qualification program. This qualification based manufacturers' qualification agreement with references Bellcore TR-NWT-00983 682. products pass strict tests before shipping. Failure criteria defined during product qualification process with following End-of- life Criteria Parameter Central wavelength drift over lifetime Threshold current Total operating current Symb Maximum deviation
Device marking
Each device includes following information minimum Alcatel logo Product family name: 1935 Product code 0041X Serial number
Shipment packing
Each device individually packed anti-static container such manner prevent damage transit. packaging shall include following information Alcatel logo Product family name: 1935 Product code 0041X Serial number Hazard warning label (ESD) Laser Safety Class Label
Deliverable data
following data shall supplied with each device L(I)/V(I) curves Tcase/ Tsubmount 25°C/25°C current voltage Tcase/Tsubmount=25°C/70°C Values Twave Thermistor Tsubmount =Twave Values laser forward current, monitoring photocurrents, laser threshold current external differential efficiency Tsubmount =Twave Slope filter photodiode Twave Photodiode current ratio Peak wavelength Tcase/Tchip=25°C under modulation Product testing shall carried level that ensures conformity customer specification
Safety IEC.825 Classification
Take appropriate precautions prevent undue exposure naked eye. This product classified Class Laser Product according IEC-60825-1 FDA/CDRH Class IIIb laser product. versions Class IIIb laser products CDRH, 1040 Laser. Safety requirements under accession number 9622256-00.
DANGER
LASER RADIATION AVOID EXPOSURE BEAM Class laser product
LASER RADIATION AVOID DIRECT EXPOSURE BEAM
less than 1550
CLASS IIIb LASER PRODUCT
Handling
This product, line with similar devices, sensitive electrostatic discharge. Take precautions prevent wrist straps, grounded work surfaces recognized anti-static techniques when handling laser. Handle laser module package only, never hold leads pigtail. package mounting following procedure should carefully followed order achieve ultimate thermal performance device, thermal paste usefully added support. Tighten screws mN/m exceed this mounting torque. Assure that leads aligned contact with appropriate contact pads.
Care should taken avoid supply transient over voltage. Over voltage above maximum specified absolute maximum rating section (table3) cause permanent damage device.
ATTENTION OBSERVE PRECAUTIONS HANDLING ELECTROSTATIC DISCHARGE SENSITIVE DEVICES
Ordering information
Alcatel 1935 Band
Nominal power Connector type FC/PC FC/PC Part number 00412 00413
defines wavelength connector according following table Connector FC/PC Connector FC/PC
1528,77 1529,16 1529,55 1529,94 1530,33 1530,72 1531,12 1531,51 1531,90 1532,29 1532,68 1533,07 1533,47 1533,86 1534,25 1534,64 1535,04 1535,43 1535,82 1536,22 1536,61 1537,00 1537,40 1537,79 1538,19 1538,58 1538,98 1539,37 1539,77 1540,16 1540,56 1540,95 1541,35 1541,75 1542,14 1542,54
196,10 196,05 196,00 195,95 195,90 195,85 195,80 195,75 195,70 195,65 195,60 195,55 195,50 195,45 195,40 195,35 195,30 195,25 195,20 195,15 195,10 195,05 195,00 194,95 194,90 194,85 194,80 194,75 194,70 194,65 194,60 194,55 194,50 194,45 194,40 194,35
1542,94 1543,33 1543,73 1544,13 1544,53 1544,92 1545,32 1545,72 1546,12 1546,52 1546,92 1547,32 1547,72 1548,11 1548,51 1548,91 1549,32 1549,72 1550,12 1550,52 1550,92 1551,32 1551,72 1552,12 1552,52 1552,93 1553,33 1553,73 1554,12 1554,54 1554,94 1555,34 1555,75 1556,15 1556,55 1556,96
194,30 194,25 194,20 194,15 194,10 194,05 194,00 193,95 193,90 193,85 193,80 193,75 193,70 193,65 193,60 193,55 193,50 193,45 193,40 193,35 193,30 193,25 193,20 193,15 193,10 193,05 193,00 192,95 192,90 192,85 192,80 192,75 192,70 192,65 192,60 192,55
Connector FC/PC
1557,36 1557,77 1558,17 1558,58 1558,98 1559,39 1559,79 1560,20 1560,61 1561,01 1561,42 1561,83 1562,23 1562,64 1563,05 1563,45 1563,86 1564,27 1564,68 1565,08 1565,49 1565,90 1566,31 1566,72 1567,13 1567,54 1567,95 1568,36 1568,77 1569,18 1569,59
192,50 192,45 192,40 192,35 192,30 192,25 192,20 192,15 192,10 192,05 192,00 191,95 191,90 191,85 191,80 191,75 191,70 191,65 191,60 191,55 191,50 191,45 191,40 191,35 191,30 191,25 191,20 191,15 191,10 191,05 191,00
March 2002 Copyright 2002 Alcatel Optronics Customized versions available large quantities. Performance figures contained this document must specifically confirmed writing Alcatel Optronics before they become applicable particular order contract. Alcatel Optronics reserves right make changes products information contained herein without notice. printed version this document uncontrolled copy.
additional information, contact your Alcatel Optronics Account Manager, following
INTERNET
http ://www.alcatel.com/optronics
optronics@alcatel.com
EUROPE France (+33) (+44) 1506 Chantilly (+1) 703-679-6715 Plano (+1) 972-477-54
Table wavelengths referenced vaccum
CANADA Gatineau (+1) 3755 ASIA PACIFIC Japan (+81)-3-5302-4341 China (+86) 6981
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