LC25W4532CBJ28 [BOOKHAM]

2.5Gb/s Buried Het Laser 360km Extended Reach With Optional Etalon Stabilization; 2.5Gb / s的埋地的Het激光360公里覆盖面更广可选的标准具稳定


型号：	LC25W4532CBJ28
厂家：	BOOKHAM, INC.
描述：	2.5Gb/s Buried Het Laser 360km Extended Reach With Optional Etalon Stabilization 2.5Gb / s的埋地的Het激光360公里覆盖面更广可选的标准具稳定
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Data Sheet

2.5Gb/s Buried Het Laser 360km Extended Reach

With Optional Etalon Stabilization

LC25W-B (360km)

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. 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.

• +/-95pm wavelength stability over life without

Etalon locker

• Optional Etalon wavelength stabilization provides

50GHz optical channel spacing compliance for interlay

or future upgrade

The device is available with a number of power options

depending on application and link span requirements.

• Narrow spectral line-width

The optional internal Etalon wavelength stabilization and low

chirp performance makes this product compliant with 50GHz

optical channel spacing.

• Internal TEC with precision NTC thermistor for

temperature control

• Entire C & L-band ITU avelengths available

(1527nm to 1605nm)

• Code reduction with single product for reaches

up to 360km

• 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

Data Sheet

Parameters

Parameter

Conditions

Min

Typ

Max

Unit

Threshold current (I_th)

Slope efficiency by product

2 mW

3 mW

4 mW

7 mW

0.04

0.06

0.08

0.09

0.13

0.17

0.43

0.143

RF input reflection coef (S₁₁)

Forward voltage

-10

1.8

1605

[1]

1.3

Peak wavelength (λ_p)

1527

µA

[2]

Dispersion penalty at 360 km

Time averaged spectral linewidth

Side-mode suppression

Optical rise/fall time

[3]

-20 dB

0.1

0.6

125

[4]

Monitor photo current

Unlocked

Etalon locked

250

1200

360

Monitor dark current

Thermistor resistance

Heatpump current

100

kΩ

70°C case temperature

15°C to 35°C

250

600

1.0

900

2.4

Heatpump voltage

Change of λ_pwith laser temp.

0.09

nm/°C

Change in λ over life and

operating conditions

Unlocked _[5]

-45

-9

+145

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 λ_p. 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 360km using an extinction ratio of 10dB.

Fiber dispersion characteristics are derived from the following equation.

D( )= ( -

)ps /(nm.km)

Where So =0.092 ps/(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.

Data Sheet

Absolute Maximum Ratings

Parameter

Min

Max

Unit

°C

Case operating temperature

Laser submount operating temperature _{[1] [2]}

Storage temperature

Laser current above Ith

Laser reverse voltage

Laser reverse current

Monitor diode bias

-40

100

1.0

µA

-10

2.4

Heatpump voltage

Fiber bend radius

Notes:

[1] Product without locker can be tuned onto the next 100 GHz ITU channel in the red shift direction (2x100 GHz 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 FITs¹in 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 3.81mm. Please see Ordering Information section.

Fiber length: 1130mm to 1190mm.

Data Sheet

Instructions for use – LC25W****B/LC25EW****B

Pin 1 and Pin 2 Thermistor

Pin 6 TEC (+), Pin 7 TEC (-)

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.

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 0.9A at 2.4V.

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

100 µA 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 8, 9, 11, 13 Case ground

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.

Pin 3 Laser DC bias (-)

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.

Pin 4 Monitor anodes, Pin 5 Common Monitor cathode

Pin 12 Laser modulation (-)

The back facet monitor provides a mean power reference for

the laser and is normally operated with a 5V reverse bias.

The data input (modulation current) is applied via this pin

which is a nominal 25 Ohm impedance coplanar line.

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 5 V to Pin 5.

Pin 14 N/C

This pin is not connected. It should be grounded if possible.

Data Sheet

Connections

Without Etalon

Function

With Etalon

Function

Thermistor

Laser DC bias (-)

Monitor Anode (-)

Monitor Cathode (+)

TEC (+)

Laser DC bias (-)

Monitor Short Anode (-)

Monitor Cathode (+)

TEC (+)

TEC (-)

Case Ground

Not Connected

Case Ground

Laser Modulation (-)

Case Ground

Not Connected

Case Ground

Monitor Long Anode (-)

Case Ground

Laser Modulation (-)

Case Ground

Not Connected

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.

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 = 7 mWpk

B = 360km - 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 LC25W4135CB-J28 can be tuned to service the 1542.14nm ITU channel.

Other connector types are available on request.

E.g. LC25W4532BB-J28 is a 7mW 1545.32 nm device with an SC connector for use in a 360km application.

E.g. LC25EW4532EB-J28 is a 2mW 1545.32 nm device with an SC connector for use in a 360km 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

BH13087 Rev 1.0 January 2007.

LC25W4532CBJ28 [BOOKHAM]

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