DATASHEET | MARCH 2012

FIBER OPTICS

| REV 2012.03

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

Video Signal Distribution in HFC and

FTTx nodes

Features

5 MHz – 200 MHz Bandwidth Supports

the Return Path CATV Application.

Excellent RF Frequency and Distortion

Characteristics for High Linearity.

Low Noise (2 pA/√Hz typ.) Low Power

Dissipation (0.85 W max.) as well as

High RF Output.

RoHS Compliant

Internal Prorietary Impedance Match

Circuitry (75Ω)

Robust Small Package with Single-Mode

Fiber Pigtail and Connector Options

The 7820C CATV optical receiver is a single-mode fiber pigtailed module featuring

a low-noise, impedance-matched broadband photodiode and RF amplification.

The device receives optical analog and/or digital signals for a range of video

broadcast options, and delivers the corresponding RF electrical output in the 200

MHz HFC return path bandwidth.

The 7820C exhibits excellent distortion performance with values well above

standards over the entire bandwidth and case temperature specifications (5 MHz

– 200 MHz, -40 °C to +85 °C).

Moreover, the proprietary impedance-match circuitry between the photodetector

and RF amplification stages resolves a number of OEM design obstacles with

very low noise performance value, typically less than 2 pA/√Hz.

The 7820C Return Path HFC CATV optical receiver can be used in both 1310 nm

and 1550 nm applications being useful at different points of a given network.

The 7820C is 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

Parameter

Limits

Frequency Range

5 – 200 MHz

Noise

2 pA/√Hz (typ)

DTO

-70 dBc (typ)

DSO

-65 dBc (typ)

Optical Input Power

Up to +1dBm

Wavelength

1260 – 1620 nm

Power Consumption

0.85 W

7820C CATV Optical Receiver

200 MHz HFC Return Path