DATASHEET | FEBRUARY 2012

FIBER OPTICS

| REV 2012.02

Information contained herein is deemed reliable and accurate as of the issue date. EMCORE reserves the right to change the design or specification at any time without notice.

Applications

Forward-Path and Return-Path

Broadband Video Transport

FTTx Receivers

EDFA and Network Monitors

Features

Low Cost Package

Low Capacitance, < 0.4 pF

Low Dark Current < 50 nA at +85

C

1 GHz Flat Response, + 0.5 dB

Extended Bandwidth Option

High Responsivity

- > 0.90 A/W at 1310 nm, typ.

- > 0.98 A/W at 1550 nm, typ.

RoHS Compliant

The 2651 provides the proven high performance of EMCORE’s photodiode

technology in a very practical, cost-effective package. The 2651A features high

linearity and low capacitance over a 1 GHz bandwidth. The extended bandwidth

2651E offers high linearity and low capacitance up to 3 GHz. These broadband

photodiodes are housed in a small, environmentally rugged coaxial package.

The 2651 broadband photodetector is designed to provide the performance and

flexibility needed to meet the expanding applications of two-way communications

networks. This photodiode is used today in forward-and return-path applications,

including AM-VSB CATV, QAM 64/256, PON, FTTC and FTTH receivers.

The 2651A and 2651E photodiodes are compliant with all criteria of the Restriction

of the Use of Hazardous Substances in Electrical and Electronic Equipment

(RoHS) guidelines 2002/95/EC

Performance Highlights

Min

Typ

Max

Units

Operating Case Temperature

-40

25

+85

C

Wavelength

1100

-

1600

nm

Responsivity, 1310 nm

1550 nm

-

-

0.90

0.98

-

-

A/W

Dark Current, 25

C

85

C

-

-

-

-

5

50

nA

Capacitance

-

0.35

0.4

pF

Bandwidth, 2651A

2651E

-

-

-

-

1000

3000

MHz

Gain Flatness, < 1 GHz

-

-

1.0

Gain Up-Tilt, 2651E, 1 GHz to 3 GHz

2

-

4

dB

DSO,

-

-

-

-

-75

-65

dBc

DTB, 2651A/E, < 1 GHz

2651E, 1 GHz – 3 GHz

-

-

-

-

-85

-75

dBc

Bias Voltage

10

12

15

V

2651A/2651E Broadband Photodiode