D1861B Datasheet, PDF (1/6 Pages) Agere Systems – D1861B 10 Gbits/s 1310 nm DML Module (-3 dBm)

Preliminary Data Sheet
March 2001
D1861B 10 Gbits/s 1310 nm DML Module (–3 dBm)
Description
The D1861B direct-modulated laser (DML) module is
a cost-effective solution for 10 Gbits/s digital trans-
mission up to 12 km using traditional intracity
SMF-28 ^† single-mode fiber links. The 1310 nm
wavelength eliminates the need for concern about
dispersion control over most installed intracity fiber
plants. The package contains a high-speed DFB
laser chip, thermoelectric cooler, thermistor, optical
isolator, and a rear-facet monitor photodiode, which
allows for external optical power control.
Features
s Direct-modulated 1310 nm laser module character-
ized for use in 10 Gbits/s operations up to 12 km
s Average optical output power, –3 dBm typical
s Temperature stabilized with internal thermoelectric
cooler (TEC), enabling operation within a wide
temperature range of –5 °C to +80 °C
s Hermetically sealed optics, isolator on TEC
s GPO* RF connector
s Single-mode fiber pigtail
s High relaxation frequency at low bias
Applications
s SR-1
s SONET/SDH low-cost metro applications
s High-speed data communications
s DWDM equipment drop-side applications
* GPO is a trademark of Gilbert Engineering Co., Inc.
7
6
5
4
3
2
1
–
+
+
–
–
TEC
MPD
DFB
ESD
PROTECTION
RTH
RF
CHOKE
10 kΩ @ 25 °C
RMATCH
45 Ω
ISOLATOR
RF CONNECTOR
1-1157(F)
Figure 1. D1861B DML Electrical Schematic
Pin Information
Table 1. Pin Descriptions
Pin No.
Description
1
Thermistor
2
Thermistor
3
Laser Cathode (–), dc Bias¹
4
MPD Anode, (Negative Bias MPD)
5
MPD Cathode
6
Thermoelectric Cooler (+)²
7
Thermoelectric Cooler (–)
1. Laser anode is case ground mAp-p drive current.
2. A positive current into this pin cools the laser.
† SMF-28 is a trademark of Corning Incorporated.