E2500 Datasheet, PDF (2/10 Pages) Agere Systems – E2500-Type 2.5 Gbits/s Electroabsorption Moudlated Isolated Laser Module (EM-ILM) for Ultralong-Reach Applications

E2500-Type 2.5 Gbits/s Electroabsorption Modulated
Isolated Laser Module (EM-ILM)
Data Sheet, Rev. 1
September 2001
Description (continued)
The package also contains a thermoelectric cooler,
thermistor, back-facet monitor, and an optical isolator.
This device exhibits excellent wavelength stability,
supporting operation at 100 Gbits/s channel spacing,
assuming an end-of-life condition of < ±100 pm over 20
years for wavelength aging, with very low FIT rates.
Wavelength stabilization schemes are not required in
DWDM systems of this type, using Agere’s E2500-
Type EM-ILM.
The E2500-Type EM-ILM is qualified for DWDM appli-
cations to Bellcore TA-TSY-000468.
Module Characteristics
Package Type 14-pin butterfly with internal isolator
Fiber
Standard single mode
Connector ST^®
RF Input 50 Ω nominal
Bit Rate 2.5 Gbits/s
Pin Information
Table 1. Pin Assignments
Pin Number
Description
1
Thermistor
2
Thermistor
3
Laser anode
4
Monitor anode
5
Monitor cathode
6
TEC (+)
7
TEC (–)
8
Case ground
9
Case ground
10
Case ground
11
Laser modulator ground
12
Modulator anode (–)/50 Ω RF input
13
Laser/modulator ground
14
Case ground
76
5
4
3
2
1
NOMINAL
IMPEDANCE
(−) (+)
(+)
(−)
(+)
50 Ω
TEC
10 k Ω
@ 25 °C
CASE OR
PACKAGE
GROUNDS
8
9
(+)
10 11
(−)
12 13 14
1-891a (F)
Figure 1. E2500 EM-ILM Schematic
2
Agere Systems Inc.