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參數(shù)資料
| 型號： | D2526G896 |
| 英文描述： | D2570, D2526, D2555 Wavelength-Selected Direct Modulated Isolated DFB Laser Module |
| 中文描述： | D2570，D2526，D2555波長選擇直接調(diào)制DFB激光器模塊隔離 |
| 文件頁數(shù)： | 2/12頁 |
| 文件大小： | 112K |
| 代理商： | D2526G896 |
2
Agere Systems Inc.
D2570, D2526G, D2555 Wavelength-Selected
Direct Modulated Isolated DFB Laser Module
Data Sheet, Rev. 3
July 2001
Description
(continued)
Controlled Feedback
The module contains an internal optical isolator that
suppresses optical feedback in laser-based, fiber-optic
systems. Light reflected back to the laser is attenuated
a minimum of 30 dB.
Controlled Temperature
An integral thermoelectric cooler (TEC) provides stable
thermal characteristics. The TEC allows for heating
and cooling of the laser chip to maintain a temperature
of 25 °C for case temperatures from –40 °C to +70 °C.
The laser temperature is monitored by the internal
thermistor, which can be used with external circuitry to
control the laser chip temperature.
Controlled Power
An internal, InGaAs, PIN photodiode functions as the
back-facet monitor. The photodiode monitors emission
from the rear facet of the laser and, when used in con-
junction with control circuitry, can control optical power
launched into the fiber. Normally, this configuration is
used in a feedback arrangement to maintain consistent
laser output power.
Standard Package
The laser module is fabricated in a 14-pin, hermetic,
metal/ceramic butterfly package that incorporates a
bias tee, which separates the dc-bias path from the RF
input. The RF input has a nominal 25
impedance.
The laser module is equipped with SMF-28
*
type fiber.
The fiber has a 900 μm tight buffer jacket. Various con-
nectors and pigtail lengths are available.
Agere Systems’ optoelectronic components are being
qualified to rigorous internal standards that are consis-
tent with Telcordia Technologies TR-NWT-000468. All
design and manufacturing operations are ISO
* 9001
certified. The module is being fully qualified for central
office applications.
* ISOis a registered trademark of The International Organization for
Standardization.
SMF-28 s a trademark of Corning Inc.
Pin Information
* A positive current through the thermoelectric heat pump cools the
laser.
Both leads should be grounded for optimum performance.
Top view.
Figure 1. Circuit Schematic
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Name
Thermistor
Thermistor
Laser dc Bias (Cathode) (–)
Back-facet Monitor Anode (–)
Back-facet Monitor Cathode (+)
Thermoelectric Cooler (+)*
Thermoelectric Cooler (–)
Case Ground
Case Ground
Case Ground
Laser Anode (+)
RF Laser Input Cathode (–)
Laser Anode (+)
Case Ground
1-567F.b
TEC
L1
160 nH
ISOLATOR
R1
20
PACKAGE
GROUNDS
+
+
–
–
+
–
+
7
6
5
4
3
2
1
8
9
10
11
12
13
TH
10 k
NC
14
–
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相關代理商/技術參數(shù) |
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|---|---|
| D2526G897 | 制造商:AGERE 制造商全稱:AGERE 功能描述:D2570, D2526, D2555 Wavelength-Selected Direct Modulated Isolated DFB Laser Module |
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