3CN004927042FW - Alcatel - Product.Network

Description

This laser module contains an

Alcatel SLMQW DFB laser with

25 Ω impedance matchi ng

designed for use in Wavelength

Division Multiplexed (WDM)

systems, high power direct

modulation operations up to

2.5 Gbit/s. The module

incorporates a thermoele ctric

cooler, precision the rmistor, and

optical isolator for stable

operation under all conditions.

Features

• 2 mW output power

• Low dispersion penalty

• Optimized for direct

modulation at 2.5 Gbit/s

• Wavelength selection

according to ITU-T G.692

from 1528.77 nm to

1570.42 nm

• 100 GHz spacing available

• Internal optical isolator

• 25 Ω RF impedance matchi ng

and DC bias RF filtering

• Industry - standard hermetic

14-pin butterfly package

• InGaAsP Distributed Feed Back

SLMQW (DFB) laser

Applications

• EDFA - free long span STM-16

and OC-48 DWDM

transmission systems

• High-sp eed DW DM

Metropolitan Area Networks

• Saturation Laser for WDM

EDFA

• Instrumentation

lcatel 1915 L MI

1.55 µm WDM Direct Modulation Laser Module

2mW

Description....................................................1

Features ........................................................1

pplications...................................................1

Electro-Opto Characteristics...........................2

Definitions.....................................................3

Mechanical details.........................................4

Pin out...........................................................4

Marking, packing and deliverable data ..........5

Safety and handling.......................................5

Ordering information.....................................6

Electro-Opto Characteristics

Unless otherwise stated : BOL, Tcase = 25°C and Tsubmount = 25°C

Table 1

Parameter Sym Conditions Min Typical Max Units

Fiber-Coupled Peak Power Ppeak @Twave 2 - mW

Threshold current ITH @Twave 3 25 mA

External Diff. Efficiency η@Twave 0.045 0.062 W/A

Laser forward voltage VF@PPeak =2 mW ; pin 11 & 3 - 2.5 V

Modulation current BOL IF@ PPeak = 2 mW ; pin 11 & 3

Note 1 -45mA

Serial resistance RSPpeak=2mW; pi n 11 t o 12 22 27 Ω

∆(Emitted -Target

Wavelength) ∆λe@Twave

See Table 4 for λtarget

-0.1 +0.1 nm

Emission wavelength λSee table 4 1529 1570 nm

Side mode suppression SMSR @Twave ; Note 2 40 - dB

Photodiode current IPD V= -5V,@Pmean, Note 5 30 300 µA

Photodiode Dark Current IDV = -5 V 0.1 µA

Photodiode Capacitance CMV = -5V, @ 1MHz 15 pF

Thermistor resistan ce RTH 9.7 10.3 kΩ

Coefficient of RTH -3 -5 %/°K

Emitted λ drift vs IF∆λ/I - 3 6 pm/mA

Emitted λ drift vs Twave ∆λ/∆Tw 20°C ≤ Tsubmount ≤ 35°C 80 100 pm/°C

Emitted λ drift vs Tcase ∆λ/∆Tc 0°C ≤ Tc ≤ 70°C -0.5pm/°C

Relative Int ensity Noise RIN 100 MHz to 3 GHz @Pmean -140 dB/Hz

Dispersion Penalty Note 2 ∆SD = 1800 ps/nm, Note 2 - 2 d B

Linearity (kink) Note 3 ∆P/∆I 0.2 mW ≤ PPeak ≤ 2 mW 15 %

Optical Isolation OI 0°C ≤ Tc ≤ 70°C 30 - dB

Tracking Error Note 4 Q @2 mW PPeak 10 %

Extinction ratio ER 2.5Gb/s,D=1800p s/nm , PR BS 2 23-1 10 dB

Case Operating

Temperature Tc 0 70 °C

Tsubmount Ts 20 35 °C

TEC current EOL It@I(2mW), Ts = 20°C, Tc = 70°C - 1.2 A

TEC voltage EOL Vt@I(2mW), Ts = 20°C, Tc = 70°C - 2.4 V

Note 1: Modulation current = PPeak /η * [ (1 – E R) / (1+ER) ]

End Of Life criteria; delta IF/IF = 20 % or delta I M / IM = 20% or delta ITH / ITH = 20%

Note 2 : 2.488 Gb/s, P Mean, BER = 10-10, ER = 10±1%, NRZ line code

Note 3 : relative deviation of dP / dI between 2 consecutive measurement points

Note 4 : Q = Max { | [P(70 C) - P(25 C)] / P(25 C) | ; | [P(0 C) - P(25 C)] / P(25 C) | }

measurements @ 0 & 70°C are with IF set at constant IF (25 C)

Note 5 : Pmean=Ppeak/2

Definitions

Twave

Twave is the submount temperature at which the laser emission wavelength reaches the target wavelength with

an accuracy of better than: λ target ± 0.1nm.

This temperature is calculated during manufacturing according to:

Twave = 25°C + (1/C)*(λ target - λ 25°C), where C is the laser wavelength drift with temperature (in nm/°C).

Emitted wavelength drift vs Tcase

Absolute value of maximum emitted wavelength deviation per unit of case temperature (°C) when Tcase varies

from min to max operating conditions.

Wavelength is stabilized through the thermal regulation of the laser chip based on the thermistor reading.

Emitted wavelength drift vs Laser Curre nt

Maximum emitted wavelength deviation per unit of laser current (mA) when the DC output power varies

around Pmean.

Absolute maximum ratings

Exposing the device to stresses above those listed in absolute maximum rating could cause permanent

damage.

Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Environmental

Table 2

Parameters Min Max Unit

Storag e tempera t u r e - 40 85 °C

Operating temperature -10 70 °C

Solderin g temper a t ure (3 seconds maxim u m ) 350 °C

Axial force on fiber (10 seconds max.) 10 N

Fiber bend radius 30 mm

ESD (1) applied on PIN detector (Pin 4&5) 100 V

ESD (1) on other Pin 2000 V

(1) Human body model

Electro-optic

Table 3

Parameters Min Max Unit

Laser forward current 150 mA

Laser reverse voltage 2 V

Photodiode forward current 1 mA

Photodiode reverse voltage 20 V

Thermistor Voltage 9 V

Thermistor Current 250 µA

TEC Voltage 2.8 V

TEC Current 1.4 A

Packing Mounting Torque 0.2 N.m

Mechanical details

Note : all dimensions in mm

Pin out

N° Description N° Description

1 Thermistor 8 Case Ground

2 Thermistor 9 Case Ground

3 Laser DC bias (-) 10 Not Connected

4 Photodetector Anode (-) 11 RF common (+)

5 Photodetector Cathode (+) 12 Laser Modulation (-)

6 TEC (+) 13 RF common (+)

7 TEC (-) 14 Not Connected

TEC

20Ω

7654321

8 9 1011121314

200 nH 10 KΩ

pigtail

Marking, packing and deliverable data

Device marking

Each device includes the following information as a minimum:

1. Alcatel logo

2. Product fam ily name: A 1915 LMI

3. Product cod e : 3CN 00492 XX

4. Serial n umber

Packing

Each device is individually packed in an antistatic container and in such a manner as to prevent damage in

transit.

The packaging shall include the following information:

1. Alcatel logo

2. Product fam ily name: A 1915 LMI

3. Product cod e : 3CN 00492 XX

4. Serial n umber

5. Hazard warning label (ESD)

6. Laser Safety Class Label

Deliverable data

The following data shall be supplied with each device:

1. L(I)/V(I) curves @ Tcase/ Tsubmount = 25°C/25°C

2. TEC @ Tcase/Tsubmou nt =25°C/75°C, P=2m W

3. Values of Twave and Thermistor @ Tsubmount =Twave

4. Values of laser forward current, monitoring photocurrent, laser threshold current and external differential

efficiency @ Tsubmount =Twave

5. Peak wavelength at Tcase/Tchip=25°C and under modulation

6. Dispersion penalt y

Product testing shall be carried out at a level that ensures conformity to the customer specification

Safety and handling

Safety and IEC.825 Classification

Take app r o p r i a t e precau tions t o p r ev en t und u e exp o sure to n a ked eye.

This product is classified Class 3A Laser Product according to IEC.825

Handling

This product, in line with all similar devices, is sensitive to electrostatic discharge. Take precautions to prevent

ESD; use wrist straps, grounded work surfaces and recognized anti-static techniques when handling the laser.

Handle the laser module by its package only, never hold it by leads or pigtail.

For package mounting the following procedure should be carefully followed:

1. In order to achieve the ultimate thermal performance of the device, thermal paste can be usefully added

on the support

2. Tighten screws up t o 200 m N/m - Do not exceed this mounting torque.

3. Assure that the leads are aligned and in contact with appropriate contact pads.

Care should be taken to avoid supply transient and over voltage. Over voltage above the maximum

specified in absolute maximum rating section (table 3) may cause permanent damage to the device.

ATTENTION

OBSERVE

PRECAUTIONS FOR

HANDLING

ELECTROSTATIC

DISCHARGE

SENSITIVE DEVICES

LASER RAD IATION

AVOID EXPOSURE TO BEAM

Class 3 A l a ser pr oduct

Ordering information

Alcatel 1915 LMI

Nominal power Connector type Part num ber

2 mW FC/PC 3CN 00492 ##

## defines the wavelength and the connector according to

the following table .

Table 4

λλ

(1)

(1)(1)

(1) THz Connector

FC/PC λ

λλ

λTHz Connector

FC/PC

1528,77 196,10 BM 1550,12 193,40 DT

1529,55 196,00 BP 1550,92 193,30 DV

1530,33 195,90 BR 1551,72 193,20 DX

1531,12 195,80 BT 1552,52 193,10 DZ

1531,90 195,70 BV 1553,33 193,00 EB

1532,68 195,60 BX 1554,12 192,90 ED

1533,47 195,50 BZ 1554,94 192,80 EF

1534,25 195,40 CB 1555,75 192,70 EH

1535,04 195,30 CD 1556,55 192,60 EK

1535,82 195,20 CF 1557,36 192,50 EM

1536,61 195,10 CH 1558,17 192,40 EP

1537,40 195,00 CK 1558,98 192,30 ER

1538,19 194,90 CM 1559,79 192,20 ET

1538,98 194,80 CP 1560,61 192,10 EV

1539,77 194,70 CR 1561,42 192,00 EX

1540,56 194,60 CT 1562,23 191,90 EZ

1541,35 194,50 CV 1563,05 191,80 FB

1542,14 194,40 CX 1563,86 191,70 FD

1542,94 194,30 CZ 1564,68 191,60 FF

1543,73 194,20 DB 1565,49 191,50 FH

1544,53 194,10 DD 1566,31 191,40 FK

1545,32 194,00 DF 1567,13 191,30 FM

1546,12 193,90 DH 1567,95 191,25 FP

1546,92 193,80 DK 1568,77 191,20 FS

1547,72 193,70 DM 1569,59 191,15 FU

1548,51 193,60 DP 1570,42 191,10 FW

1549,32 193,50 DR

(1) in vacuum

October 2001

Alcatel Optronics

Customized versions are available

for large quantities.

Performance figures contained in

this document must be specifically

confirmed in writing by Alcatel

Optronics before they become

applicable to any particular order

or contract. Alcatel Optronics

reserves the right to make changes

to the products or information

contained herein without notice.

EUROPE

Route de Ville just

F-91625 NOZAY CEDEX

Tel : (+33) 1 64 49 49 10

Fax : (+33) 1 64 49 49 61

USA

15036, Conference Centre Drive

CHANTILLY - VA 20151

Tel : (+1) 703 679 3600

Fax : (+1) 703 679 6667

CANADA

45, De Villebois, suite 200

Gatineau (PQ)

Canada, J8T 8J7

Tel : (+1) 819 243 3755

Fax : (+1) 819 243 3354

JAPAN

Dai-Tokyo Kasai

Shinjuku Building 13F

3-25-3, Yoyogi, Shibuya-Ku

Tokyo 151 – 0053 – Japan

Tel : (+81) 3 5302 4341

Fax : (+81) 3 5302 4331