Advance Data Sheet

D171-Type

FastLight PIN Photodetectors

March 1999

2

2

Lucent Technologies Inc.

Description

The D171-Type Photodetector consists of a PIN cou-

pled to a multimode fiber pigail. The device is available

in a 4-pin mini-DIL configuration (see Figure 3 and/or

Table 1) and is ideal for long-reach (SONET) and other

high-speed digital applications.

The D171-Type PIN Photodetector is a rear-illuminated

planar diode structure with a low-capacitance active

area for maximum responsivity and speed.

This device incorporates the new Laser 2000 manufac-

turing process from the Optoelectronics Products unit

of Lucent Technologies Microelectronics Group. Laser

2000 is a low-cost platform that targets high-volume

manufacturing and tight product distributions on all

optical subassemblies. This platform incorporates an

advanced optical design that is produced on Opto’s

highly automated production lines. The Laser 2000

platform is qualified for central office and uncontrolled

environments, and can be used for applications requir-

ing high perfomance and low cost.

Figure 1. Typical Bias Connection

Notes:

This equivalent circuit is intended for modeling the package

capacitance. Minimum capacitance is achieved by connecting the N-

side to ground, applying a negative voltage to the P-side, and allowing

the package to float (i.e., not connected to ground).

Typical values are as follows:

Ω.

Figure 2. Equivalent ac Circuit for Digital

Applications

Figure 3. D171-Type PIN Photodetector Schematic

(Top View)

10 V

LOAD

PIN 2

PIN 3

N

P

Table 1. Pin Descriptions

Pin Number

Description

1NC

2

Photodiode Cathode

3

Photodiode Anode

4

Case Ground

1-697

LOAD

PIN 3

PIN 2

N

P

LOAD

4

3

1

2

1-902.a