LC25W4532CAJ28 [BOOKHAM]
2.5Gb/s Buried Het Laser 175km Reach With Optional Etalon Stabilization; 2.5Gb / s的埋地的Het激光175公里河段可选配标准具稳定型号: | LC25W4532CAJ28 |
厂家: | BOOKHAM, INC. |
描述: | 2.5Gb/s Buried Het Laser 175km Reach With Optional Etalon Stabilization |
文件: | 总6页 (文件大小:223K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Data Sheet
2.5Gb/s Buried Het Laser 175km Reach
With Optional Etalon Stabilization
LC25W-A (175km)
This laser module employs the Bookham strained layer
MQW Buried Heterostructure DFB laser chip, and has been
designed specifically for use in Wavelength Division
Features:
• 2.5Gb/s operation
Multiplexed (WDM) 2.5Gb/s long distance optical fiber
trunk systems.
• +/-95pm wavelength stability over life without
Etalon locker
The device is packaged in a hermetically sealed 14-pin
butterfly package incorporating an isolator and monitor
photodiode for control of the power of the laser over life and
all operating conditions. The device is available with a number
of power options depending on application and link
span requirements.
• Optional Etalon wavelength stabilization provides
50GHz optical channel spacing compliance for interlay
or future upgrade
• Narrow spectral line-width
• Internal TEC with precision NTC thermistor for
temperature control
The optional internal Etalon wavelength stabilization and low
chirp performance makes this product compliant with 50GHz
optical channel spacing.
• Entire C & L-band ITU wavelengths available
(1527nm to 1605nm)
• Code reduction with single product for reaches
up to 175km
• GaInAsP SLMQW DFB single frequency laser chip
• InGaAs monitor photo-diode
• Hermetically sealed 14-pin butterfly package with
optical isolator
• RoHS compliant
Applications:
• WDM
• On-off ramps
• Long-Haul
• DWDM on ITU Grid
1
Data Sheet
Parameters
Parameter
Conditions
Min
Typ
Max
Unit
Threshold current (Ith)
Slope efficiency by product
10
22
mA
2 mW
3 mW
4 mW
10 mW
0.04
0.06
0.08
0.09
0.13
0.17
0.43
mW/mA
0.143
RF input reflection coef (S11)
Forward voltage
-10
1.8
1605
2
dB
V
[1]
1.3
Peak wavelength (λp)
1527
32
nm
dB
nm
dB
ps
[2]
Dispersion penalty at 175 km
Time averaged spectral linewidth
Side-mode suppression
Optical rise/fall time
[3]
-20 dB
0.1
40
0.6
125
[4]
Monitor photo current
Unlocked
Etalon locked
50
40
250
250
1200
360
µA
Monitor dark current
Thermistor resistance
Heatpump current
100
nA
kΩ
10
600
1.0
70°C case temperature
70°C case temperature
15°C to 35°C
250
900
2.4
mA
V
Heatpump voltage
Change of λp with laser temp.
0.09
nm/°C
pm
Change in λ over life and
operating conditions
Unlocked [5]
-45
-9
+145
+9
Optical Spectral Window
Locked, over life & temperature
including chirp [5]
GHz
[1] 50 Ω measurement system, f = dc - 3GHz.
[2] Submount temperature between 20°C to 35°C start of life to achieve required λp. For the 10mW version, submount
temperature is between 15°C to 35°C start of life.
[3] Standard product dispersion penalty will be compliant to the specified link length of 175km using an extinction ratio of 10dB.
Fiber dispersion characteristics are derived from the following equation.
4
So
0
D( )= ( -
)ps /(nm.km)
3
4
Where So = 0.092ps/(nm2.km) and λ= 1302nm.
[4] Measurements determined from 20 - 80% pk - pk.
[5] For more information on wavelength control and drift over life refer to applications note DR1670. To give symmetrical
wavelength performance about the ITU channel wavelength (+/-95pm) offset the laser wavelength by –50pm at start of life
set up.
2
Data Sheet
Absolute Maximum Ratings
Parameter
Min
0
Max
70
Unit
°C
°C
°C
mA
V
Case operating temperature
Laser submount operating temperature [1] [2]
Storage temperature
Laser current above Ith
Laser reverse voltage
Laser reverse current
Monitor diode bias
20
-40
35
85
100
1.0
10
µA
V
-10
2.4
30
Heatpump voltage
V
Fiber bend radius
mm
Notes:
[1] Product without locker can be tuned onto the next 100GHz ITU channel in the red shift direction (2x100GHz tunability) by increasing the
submount temperature to a maximum of 43°C.
[2] For the 10mW version, the minimum laser submount operating temperature is 15°C.
Reliability/Quality
Meets qualification requirements of Telcordia / Bellcore GR468-Core for central office environment.
Operating reliability <500 FITs1 in 15 years.
1- Assumes laser die submount held at <35°C by internal thermoelectric cooler, mean forward current of 35
mA, and end of life limits based on 10 mA increase in Ith and 25% change in laser efficiency. FIT rate data for
other end of life criteria, including minimum extinction ratio requirements, are available upon request.
Outline Drawing
Dimensions (mm)
Figure 1: Outline Drawing
Note:
Devices can be supplied with the leads trimmed to a length of 3.81 mm. Please see Ordering Information section.
Fiber length: 1130mm to 1190mm
3
Data Sheet
Instructions for use – LC25W****A/LC25EW****A
Pin 1 and Pin 2 Thermistor
Pin 8, 9, 11, 13 Case ground
The thermistor is used in a control loop in conjunction with
the thermo-electric cooler to maintain the laser submount
temperature at the required value for wavelength.
Operating current should be less than 100µA to prevent
self-heating errors.
These pins must be grounded in all applications.
Pin 10
This pin is not connected for the LC25W product and it
should be grounded if possible. For the Etalon locked
product this pin is used for the monitor long anode.
The monitor diodes are arranged such that they give an
equal monitor current when the laser wavelength is matched
to the ITU grid. A reverse bias must be applied equally across
each of the monitors, this is commonly achieved by applying
5V to pin 5.
For Etalon stabilized devices the thermistor is used for the
initial set up of the submount temperature at the required
wavelength value. Operating current should be less than
100µA to prevent self-heating errors. Once the initial
submount temperature has been achieved control of the TEC
current is handed over to the Etalon locking circuit to achieve
fine tuning.
Pin 3 Laser DC bias (-)
Pin 12 Laser modulation (-)
Laser bias current (negative with respect to package ground)
is applied via this pin which forms one side of the bias-T
connection to the laser cathode.
The data input (modulation current) is applied via this pin
which is a nominal 25 Ohm impedance coplanar line.
For 10mW applications the end of life modulation current is
90mA maximum. For all other applications 60mA maximum
modulation current should be provisioned.
Pin 4 Monitor anodes, Pin 5 Common Monitor cathode
The back facet monitor provides a mean power reference for
the laser and is normally operated with a 5V reverse bias.
Pin 14 N/C
This pin is not connected. It should be grounded if possible.
For Etalon stabilized devices the monitor diodes are arranged
in the package such that they give an equal monitor current
when the laser wavelength is matched to the ITU grid. A
reverse bias must be applied equally across each of the
monitors, this is commonly achieved by applying 5V to Pin 5.
Pin 6 TEC (+), Pin 7 TEC (-)
Applying a positive voltage on pin 6 with respect to pin 7 will
cause the internal submount to be cooled relative to the case
temperature. Reversing the polarity will raise the submount
temperature relative to the case. The TEC supply should be
capable of delivering up to 0.9 A at 2.4V.
4
Data Sheet
Connections
Without Etalon
Function
With Etalon
Pin #
1
Pin #
1
Function
Thermistor
Thermistor
2
Thermistor
2
Thermistor
3
Laser DC bias (-)
Monitor Anode (-)
Monitor Cathode (+)
TEC (+)
3
Laser DC bias (-)
Monitor Short Anode (-)
Monitor Cathode (+)
TEC (+)
4
4
5
5
6
6
7
TEC (-)
7
TEC (-)
8
Case Ground
Case Ground
Not Connected
Case Ground
Laser Modulation (-)
Case Ground
Not Connected
8
Case Ground
Case Ground
Monitor Long Anode (-)
Case Ground
Laser Modulation (-)
Case Ground
Not Connected
9
9
10
11
12
13
14
10
11
12
13
14
Safety Information
Laser safety classifications:
IEC 60825-1: Edition 1.2 Class 1M
21 CFR Ch.1 (4-1-97 Edition) Class IIIb
Electrostatic discharge:
ESD threshold >500V
TA-TSY-000870 class 3.
5
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:
LC25
[Etalon Option]
[Wavelength] [Power Option]
[Reach]
[Connector]
W = none
EW = Etalon
****
E = 2 mWpk
C = 3 mWpk
A = 4 mWpk
B = 10 mWpk
A = 175 km - J28 = SC/PC
J34 = FC/PC
J57 = LC
J59 = MU
**** = Last four digits of wavelength value E.g. for lp = 1545.32nm **** = 4532
Product without locker can be tuned onto the next 100GHz ITU channel in the red shift direction
(2x100GHz tunability) i.e. an LC25W4135CA-J28 can be tuned to service the 1542.14 nm ITU channel.
Other connector types are available on request.
E.g. LC25W4532BA-J28 is a 10mW 1545.32 nm device with an SC connector for use in a 175km application.
E.g. LC25EW4532EA-J28 is a 2mW 1545.32 nm device with an SC connector for use in a 175km application
with optional Etalon stabilization.
Trimmed lead option
Devices can be supplied with the leads trimmed to a length of 3.81mm typ.
This option can be specified by adding a ‘K’ suffix after the reach option.
E.g. LC25W4532BAK-J28 is a 10mW 1545.32nm device with an SC connector and a lead length of 3.81mm
typical, for use in a 175km application.
Contact Information
Important Notice
North America
Europe
Asia
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.
Bookham Worldwide
Headquarters
Paignton Office
Shenzhen Office
Brixham Road
Paignton
Devon
TQ4 7BE
United Kingdom
2 Phoenix Road
Futian Free Trade Zone
Shenzhen 518038
China
2584 Junction Ave.
San Jose
CA 95134
USA
• Tel: +86 755 33305888
• Tel: +1 408 919 1500
• Fax: +1 408 919 6083
• Tel: +44 (0) 1803 66 2000
• Fax: +44 (0) 1803 66 2801
• Fax: +86 755 33305805
+86 755 33305807
www.bookham.com
sales@bookham.com
DANGER
INVISIBLE LASER RADIATION
DO NOT VIEW DIRECTLY WITH
OPTICAL INSTRUMENTS
CLASS 1M LASER
INVISIBLE LASER RADIATION
AVOID DIRECT
EXPOSURE TO BEAM
OUTPUT POWER 21mW
WAVELENGTH >1510nm
ISO14001:1996
Caution - use of controls or adjustments
or performance of procedures other than
those specified herein may result in
hazardous radiation exposure.
EMS 504193
TL9000 Rev 3.0 (ISO9001:2000)
FM15040
REFERENCE IEC 60825-1: Edition 1.2
CLASS IIIb LASER PRODUCT
THIS PRODUCT COMPLIES
WITH 21 CFR 1040.10
6
BH13088 Rev 1.0 January 2007.
©Bookham 2006. Bookham is a registered trademark of Bookham Inc.
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