10dBm Output Single Channel Booster EDFA Optical Amplifier for SDH Networks

FM SKU#:SKU30503S
Model#:SDH-EDFA-BA-O10
MFG PART#:

 

10 dBm Output Single Channel Booster EDFA Optical Amplifier for SDH Networks

Fiber-Mart SDH-EDFA-BA-O6 booster amplifier designed for the Synchronous Digital Hierarchy (SDH) applications which installed after the optical transmitter to increase transmission distance for single wavelength optical module system. The device features wide input power range from -10dBm to +6dBm, output power up to 10dBm and low noise figure. It also includes RS-232 computer interface.

This Rack mountable amplifier work by default in constant signal-gain mode, but they can be configured to constant total output-power mode. These units are used in long-hauls transmission applications, especially for PDH, SDH, SONET and optical Ethernet transmission application. Its ease-of-use and performance make the SDH-EDFA-BA-xx series the ideal solution for Access and Metro optical networks.

 

Features

• Service as a booster amplifier C-Band 1550nm
• Tunable output power: 10dBm
• Wide input power range: -10~+6dBm
• Low loise figure: typical is< 4.5dB
• Connectors: SC/UPC, SC/APC, FC/UPC, FC/APC, LC/UPC, LC/APC, ST/UPC and ST/APC connectors are available
• Single or dual 110VAC, 220VAC, -48VDC, and/or 100V-240V power supply
• Serial interface comes with RS232, RS485
• 1U 19” rack mount structure for easy installation
• All performance compatible with BellcoreGR-1312-CORE request
• Use for Access and Metro optical networks
• Works with point-to-point applications
• High stability and reliability
• 3 years warranty
• 10 years of operation life
• OEM is available

Highlights

• Hot Swap Network Management Agent
• SNMP network management interface: RJ45
• Support Telnet for optional
• ASE noise filter & ASE suppression filters
• High Precise ACC (automatic constant current) Circuit as default, if you need other circuit, please contact at sales@fiber-mart.com
• ATC (automatic temperature control) function
• Offering status appearance and diagnosing fault with LCD

Mechanical Structure

Structure Example

NOTE:

• The SDH EDFA from Fiber-Mart including 1+2+3.

Parameters	Symbol	Min	Typ	Max	Unit
Operation Wavelength	λc	1530	1550	1562	nm
Saturated output power (1)	Po			10	dBm
Input power (2)	Pi	-10		6	dBm
Gain	G	------		------	dB
Noise Figure	NF		4.5		dB
Input Isolation	ISOi	30			dB
Output Isolation	ISOo	30			dB
Input pump leakage	PumpLin			-35	dBm
Output pump leakage	PumpLout	-45		-45	dBm
Return Loss	RL			-45	dB
Polarization Dependent Gain	PDG			0.3	dB
PMD	PMD			0.5	ps
Operation Temperature	Tw	-5		60	℃
Storage Temperature	Ts	-40		80	℃
Humidity (3)		10		85	%
Power Voltage	Vps	85/170	110/220	132/264	VAC
Power Consumption	P			18	W
Serial interface	RS232, RS485
Power supply	110VAC, 220 VAC, -48VDC, or 100V-240V
Connectors	Simplex SC/UPC, SC/APC, FC/UPC, FC/APC, LC/UPC, LC/APC , ST/UPC and ST/APC available
Warranty	3 years

(1): Customer optional
(2): Pre-Amplifier: input power –35~-25dBm; Inline-Amplifier: input power –25~-10dBm, Booster: input power –10～+6dBm

EDFA (Erbium-doped Fiber Amplifier) for WDM System

by www.fiber-mart.com

Optical amplifiers serve as an integrated part of long haul data transmission. The most prominent feature of optical amplifier is that the device can amplify optical signal directly without the need to convert the signal into an electrical one before amplifying. EDFA (Erbium-doped Fiber Amplifier) is the one type of many different optical amplifiers that can achieve signal amplification over long-hual optical communication.

 

Optical Amplifier Basics

When transmitting over long distance, the optical signal has to be amplified many times in between owing to the signal loss from fiber attenuation, connectivity losses, fiber splicing losses, etc. Before optical amplifier is invented, the optical signal has to be first converted into electrical signal, amplified, and then converted back to optical signal again. The process is very complicated and expensive. Optical amplifier has since been invented that can amplify signals directly, this process is significantly cheaper and started a fiber optic revolution. There are three fiber optic amplifier types: EDFA, Raman amplifier and semiconductor optical amplifier(SOA).

 

EDFA optical amplifier

 

What Is EDFA Amplifier?

EDFA, or Erbium-doped Fiber Amplifier, is the most deployed optical amplifier in the WDM system that uses the Erbium-doped fiber as optical amplification medium to directly enhance the signals. The amplifying medium is a glass optical fiber doped with erbium ions. The erbium-doped fiber gain medium amplifies light at wavelengths that are in the neighborhood of 1550 nm—the optical wavelengths that suffer minimum attenuation in optical fibers. EDFA works best in the range 1530 to 1565 nm, and it possesses low noise and can amplify many wavelengths simultaneously, making it the fiber amplifier of choice for most applications in optical communications.

 

Three EDFA Amplifier Types for DWDM Connectivity

According to the functions, EDFA can be divided into three types: booster amplifier, in-line amplifier and pre-amplifier.

 

Erbium-Doped-Fiber-Amplifier

 

Booster Amplifier

A booster amplifier operates at the transmission side of the link, designed to amplify the signal channels exiting the transmitter to the level required for launching into the fiber link. It’s not always required in single channel links, but is an essential part in DWDM link where the multiplexer attenuates the signal channels. It has high input power, high output power and medium optical gain. The common types are 20dBm Output C-band 40 Channels 26dB Gain Booster EDFA, 16dBm Output C-band 40 Channels 14dB Gain Booster EDFA and so on.

 

In-line Amplifier

An in-line amplifier is generally set at intermediate points along the transmission link in a DWDM link to overcome fiber transmission and other distribution losses. Optical line amplifier is designed for optical amplification between two network nodes on the main optical link. In-line amplifiers are placed every 80-100 km to ensure that the optical signal level remains above the noise floor. It features medium to low input power, high output power, high optical gain, and a low noise figure.

 

Pre-amplifier

A pre-amplifier operates at the receiving end of a DWDM link. Pre-amplifier is used to compensate for losses in a demultiplexer near the optical receiver. Placed before the receiver end of the DWDM link, pre-amplifier works to enhance the signal level before the photo detection takes place in an ultra-long haul system, hence improving the receive sensitivity. It has relatively low input power, medium output power and medium gain.

 

How Does EDFA Work?

Basically, EDFA consists of a length of EDF(Erbium doped fibre), a pump laser, and a WDM combiner. The WDM combiner is for combining the signal and pump wavelength, so that they can propagate simultaneously through the EDF. The lower picture shows a more detailed schematic diagram of EDFA.

 

working priciple of EDFA

The optical signal, such as a 1550nm signal, enters an EDFA amplifier from the input. The 1550nm signal is combined with a 980nm pump laser with a WDM device. The signal and the pump laser pass through a length of fiber doped with Erbium ions. The 1550nm signal is amplified through interaction with the doping Erbium ions. This action amplifies a weak optical signal to a higher power, effecting a boost in the signal strength.

 

Why EDFA Fiber Amplifier Is Essential for DWDM System?

Nowadays, EDFA optical amplifier rises as a preferable option for signal amplification method for DWDM systems, owing to its low-noise and insensitive to signal polarization. Besides, EDFA deployment is relatively easier to realize and more affordable compared with other signal amplification methods.

 

Advantages

EDFAs have high pump power utilization (>50%)

Directly and simultaneously amplify a wide wavelength band (>80nm) in the 1550 nm region, with a relatively flat gain.

Flatness can be improved by gain-flattening optical filters.

Gain in excess of 50 dB.

Low noise figure suitable for long haul applications.