LC25ETCBJ57 [BOOKHAM]

2.5 Gb/s Buried Het 4x100GHz Tunable Laser with Etalon Stabilisation and extended reach option; 2.5 Gb / s的埋地的Het 4x100GHz可调谐激光器与标准具稳定和扩大范围的选择


型号：	LC25ETCBJ57
厂家：	BOOKHAM, INC.
描述：	2.5 Gb/s Buried Het 4x100GHz Tunable Laser with Etalon Stabilisation and extended reach option 2.5 Gb / s的埋地的Het 4x100GHz可调谐激光器与标准具稳定和扩大范围的选择
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Data Sheet

2.5 Gb/s Buried Het 4x100GHz Tunable Laser with

Etalon Stabilisation and extended reach option

LC25ET

This laser module employs the Bookham gain coupled

SLMQW buried heterostructure DFB laser chip, and has been

designed specifically for use in Wavelength Division

Features:

• 2.5 Gb/s Operation

Multiplexed (WDM) 2.5 Gb/s long distance optical fibre

trunk systems.

• Tunable over four separate channels at 100 GHz

channel spacing

The device is packaged in a hermetically sealed 14-pin

butterfly package incorporating an isolator and locking optics

to lock and stabilise wavelength and power of the laser

over life.

• Integrated wavelength locking optics

• Entire C band ITU wavelengths available

(1528 to 1563 nm)

The module is tunable by means of the internal thermo-electric

cooler over four adjacent 100 GHz ITU WDM channels.

• Narrow spectral line-width

• Hermetically sealed 14-pin butterfly package with

optical isolator

The device is available with a number of power options and

wavelength schemes, which are customizable to individual

customer specification. The internal etalon wavelength

stablilisation and low chirp performance makes this product

compliant with 50GHz optical channel spacing.

• Internal TEC with precision NTC thermistor

• Extended reach performance up to 360 km with low

dispersion penalty

• 50GHz optical channel spacing compliant for interlay

or future upgrade

• RoHS compliant

Applications:

• Optical Service Channel (OSC) applications in DWDM

transmission systems using optical amplifiers.

Data Sheet

Parameters

Parameter

Conditions

Min

Typ

Max

Unit

Threshold current (I_th)

Slope efficiency

2 mW

3 mW

4 mW

0.04

0.06

0.08

0.09

0.13

0.17

0.43

mW/mA

High Power _[1]

0.143

RF input reflection coef (S₁₁)

Forward voltage

-10

1.8

1563

[2]

[3]

1.3

Peak wavelength (λ_p)

Dispersion penalty

1527

[4]

Time averaged spectral line width

Side-mode suppression

Optical rise/fall time

-20 dB

0.4

0.6

125

360

[5]

Monitor photo currents

Monitor dark current

250

µA

Thermistor resistance

Heatpump current

4.07

20.7

1000

2.4

kΩ

∆T = 64°C

8 to 50°C

Heatpump voltage

Change of λ with laser temp.

Optical spectral window

0.09

nm/°C

GHz

Over life & temperature

including chirp _[6]

-9

[1] The high power version provides 10 mW peak output power for 175 km applications and 7 mW peak output power for

360 km applications.

[2] 50 Ω measurement system, f = dc - 3 GHz.

[3] Submount temperature between 0°C & 40°C start of life to achieve required λ_p.

[4] Dispersion penalty is compliant to a link length of 175 km or 360 km using an extinction ratio of 10dB. Fibre dispersion

characteristics are derived from the following equation:

D(λ) =

(λ −

)ps /(nm.km)

where So =0.092 ps/(nm²km) and λ₀= 1302 nm.

[5] Measurements determined from 20 - 80% Pk - Pk.

[6] For more information on wavelength control and drift over life refer to application note DR1670.

Data Sheet

Absolute Maximum Ratings

Parameter

Min

Max

Unit

°C

Case operating temperature

Laser submount operating temperature

Storage temperature

Laser current above I_th

Laser reverse voltage

Laser reverse current

Monitor diode bias

-40

100

1.0

µA

-10

Heat pump current

Heat pump voltage

2.4

Fibre bend radius

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 is held within the range 8°C to 50°C by the internal thermoelectric cooler and the product is

deployed in equal quantities on each of the four channels with a mean forward current of 35 mA. 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 on request.

Outline Drawing

Figure 1: Outline Drawing.

Data Sheet

Figure 2: Schematic Diagram.

Connections

Pin #

Function

Pin #

Function

Thermistor

Case ground

Thermistor

Case ground

Laser DC bias (-)

Monitor short anode (-)

Monitor cathode (+)

TEC (+)

Monitor long anode (-)

Laser case ground

Laser modulation (-)

Laser case ground

N/C

TEC (-)

Instructions for use – LC25ET

Pin 1 and Pin 2 Thermistor

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 100 µA to prevent

self-heating errors.

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 +10 Monitor anodes, Pin 5 Monitor cathode

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 10 V 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 1.0 A at 2.4 V.

Pin 8, 9, 11, 13 Case ground

These pins must be grounded in all applications.

Pin 12 Laser modulation (-)

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 14 N/C

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

Data Sheet

Ordering Information

LC25ET [Wavelength]

****

[Power Option]

[Reach]

[Connector]

E = 2 mWpk

C = 3 mWpk

A = 4 mWpk

B = High power

A = 175 km -

B = 360 km -

J28 = SC/PC

J34 = FC/PC

J57 = LC

J59 = MU

Fibre Length 1130 to 1190 mm.

Other connector types are available on request.

**** = Last four digits of first channel / shortest wavelength

E.g. LC25ET4532CA-J28 has the following four channels:

1545.32 nm

1546.12 nm

1546.92 nm

1547.72 nm

The high power option provides 10 mW peak power at 175 km or 7 mW peak power over 360 km.

E.g. LC25ET4532BA-J28 is a 10 mW 1545.32 nm device with an SC connector for use in a 175 km application.

E.g. LC25ET4532BB-J28 is a 7 mW 1545.32 nm device with an SC connector for use in a 360 km application.

Lead trimming option

Devices can be supplied with the leads trimmed to a length of 3.81 mm typ.

This option can be specified by adding a ‘K’ suffix after the reach option.

E.g. LC25ET4532BAK-J28 is a 10 mW 1545.32 nm device with an SC connector and a lead length of 3.81mm typical, for use in

a 175 km application.

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.

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

REFERENCE IEC 60825-1: Edition 1.2

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

CLASS IIIb LASER PRODUCT

THIS PRODUCT COMPLIES

WITH 21 CFR 1040.10

BH13170 Rev 1.0 January 2007.

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