EDFA-C-Pre-Amplifier - MRV Communications, Inc.

EDFA C-Band Amplifier

RedC Optical Networking’s EDFA C-Band Amplifier

is a self-adjusting, dynamic amplifier that enables

transparent and scalable operation in an evolving

WDM network environment.

Based on three pending patents, the EDFA C-Band

Amplifier features an extremely high dynamic gain

range over a wide input power range. The Amplifier

automatically maintains the output flatness and

presents a low noise figure throughout its extended

operating range. These capabilities are achieved

through the Amplifier’s all-silica fiber technology.

The EDFA C-Band Amplifier can accommodate the

full spectrum of EDFA applications such as Metro,

Long-haul and CATV. It handles fast optical power

transients and is integrated with autonomous

electronics to facilitate monitoring and controlling

of its components. The Amplifier’s software runs

on a fast RISC processor, utilizing high-level

algorithms to maintain its functionality and

flexibility. RedC’s EDFA C-Band Amplifier product

line includes pre-amplifiers, booster amplifiers,

and in-line amplifiers.

EDFA C-Band Amplifier

Extended Dynamic Gain Range

As opposed to standard EDFA amplifiers, which are

designed to work in a specific gain range, RedC’s EDFA

C-Band Amplifier features an extended dynamic gain

range over the entire C-band. This unique capability

offers the following benefits:

Provides flexibility and resilience.

Eliminates the use of Variable Optical Attenuators

(VOAs) at EDFA input, thus presenting a low noise

figure throughout the whole operating range.

Eliminates the use of an external dynamic gain filters

or power equalization at the amplifier’s output.

In system design

In deployment

Accommodates the upgrade and evolution of

WDM networks, especially in capacity and channel

count, thereby eliminating the replacement of

deployed amplifiers that is usually necessary with

a standard EDFA.

Reduces the number of amplifier types in use to

accommodate a wide variety of network topologies,

fiber spans, and fiber losses.

Ensures optimized network performance over time,

compensating for fiber performance degradation,

aging, and line instabilities.

Remotely accommodates topology changes in

a WDM network architecture, especially in a

mesh configuration.

Simplifies line mapping and span loss measurements

during the network deployment.

-23 -22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2

Gain dB

Composite Input Power Level dBm

Entire C-band (Standard)

Entire C-band (RedC’s)

Red Band only

Constant Power Line

Constant Gain Line

Flatness limited (1.5dB max.)

Noise figure limited (6.5dB max.)

Flatness limited (1.5dB max.)

Output power limited (19dBm)

All-Fiber Dynamic Gain Equalization and Tilting Compensation

Based on its patented all-silica fiber technology, RedC’s EDFA C-Band Amplifier

presents unique advantages:

Spectral flattening of a multi-channel signal without the need for external dynamic filters or

wavelength monitoring with power equalizers. This unique method, based on an internal

all-silica fiber equalizer, saves the correlated insertion loss at the amplifier output stage.

Equalizes and reshapes the tilt of the amplified channels. By optimizing a single amplifier, or

more effectively, by remotely applying tilt adjustment on cascaded amplifiers, the Amplifier

compensates for wavelength dependent loss and line non-linearities and reshapes the

spectrum of the line’s channels.

Maintains high reliability exclusive to an all-silica fiber system.

Performance Demonstration of RedC's Extended Operating Range

Example for a 19 dBm In-Line Amplifier

EDFA C-Band Amplifier

Additional Features

Less than 50 µsec transient time – By efficiently addressing the effect, a longer amplifier

chain design can be accommodated.

Allows up to 9dB mid-stage loss access – Standard EDFA amplifiers are designed to work per a specific mid-

stage loss. RedC’s EDFA C-Band Amplifier is completely flexible and automatically adjusts its operation to

the measured mid-stage loss.

Remote correction of SMF or DCF wavelength dependent loss

Automatic gain control or automatic power control modes of operation

User remote management control

Variable software adjusted gain – The differences in span length or fiber loss can be addressed and

remotely compensated.

Simple command set – Commands are applied through a standard RS-232 port. The on-board electronics

are highly integrated with the Amplifier’s components, allowing an extended level of flexibility in changing

amplifier parameters and monitoring its operation.

Fine tuning on channel count – The channel count and wavelength can be optionally programmed to provide

extra fine tuning of the Amplifier’s gain.

Software upgradability – Supports remote software upgrading for deployed amplifiers.

Low power consumption

Low mechanical profile

RedC's EDFA-C In-Line Amplifier Optical Specifications

Parameter

Wavelength

Composite Input Power Level

Saturation Power Available

Gain/Channel

Dynamic Gain Range

Multi-Channel Gain Flatness at

Operating Range (all gain value)

Noise Figure

Polarization Mode Dispresion

Mid-Stage Access Loss (Optional for

Double Stage Configuration)

Polarization Dependent Loss

Return Loss

Operating Temperature

Dimensions

Total Power Consumption

Min Max Units

1530

------

151x151x18

1562

±0.75

6.5

0.5

0.3

240x145x30

dBm

psec

Parameter

Wavelength

Composite Input Power Level

Small Signal Gain

Multi-channel Gain Flatness

Noise Figure

Polarization Mode Dispersion

Polarization Dependent Loss

Return Loss

Operating Temperature

Dimensions

Total Power Consumption

Min Max Units

1529

-39

------

1561

-20

±0.75

4.5

0.5

0.3

151x131x18

dBm

psec

RedC EDFA-C Pre-Amplifier Optical Specifications

RED-C

Optical Networking

RedC Optical Networks Ltd.

3 Tvu'ot Ha'aretz Street

Tel Aviv 69546, Israel

Tel: 972-3-647-6789

Fax: 972-3-647-6990

www.redcinc.com

Parameter

Wavelength

Composite Input Power Level

Saturation Power Available

Multi-Channel Gain Flatness at

Designated Gain

Noise Figure

Multi-Channel Gain Flatness at

Designated Gain ±1.5dB

Polarization Mode Dispresion

Mid-Stage Access Loss (Optional for

Double Stage Configuration)

Polarization Dependent Loss

Return Loss

Operating Temperature

Dimensions

Total Power Consumption

Min Max Units

1529

-5

------

1561

±0.75

±1

0.5

0.3

151x151x18

dBm

psec

RedC EDFA-C Booster Optical Specifications