Olson Technology OTEB-CO-B User Manual

OTEB-CO-B EDFA WITHOUT SNMP

INSTRUCTION MANUAL

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OTEB-CO-B (No SNMP) Rev. X7

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[phone]

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www.olsontech.com

11/17/2010

SAFETY WARNINGS

LASER RADIATION

The OTEA-CO-B EDFA emits invisible radiation that can cause permanent eye damage.

DIRECT EXPOSURE TO BEAM.

the optical connector. Power to the OTEA-CO-B EDFA should be turned off or preferably,
disconnected whenever the optical connector cover is opened and there is no installed fiber (as
when the fiber connector is being installed or removed from the optical connector). When the
amplifier isworking in normal state, theoutput power of lightwith wavelengths in theinvisible range

(

infrared light) may exceed +26dBm (400mW). Therefore, to avoid damaging your eyes, do not

look into the outputport oftheEDFAdirectly.

NEVER

look at the end of the fiber to see if light is coming out Most fiber optic laser
wavelengths (1310nm and 1550nm) are totally invisible to the unaided eye and will cause
permanent damage.Always useinstruments, such asanoptical power meter,to verify lightoutput.

Use extreme carewith ,

NEVER

look intothe output ofthe EDFA or afiber connected toan EDFA

NEVER

clean an optical connectorwith opticalpowerpresent.

NEVER

look into or use any optical instrument to view the distant end of a fiber that may be
connected directly or via an optical splitter, to a transmitter or EDFA that may be operating. This
specifically applies to fibers that are to be connected to receivers (such as the OTPN-2000C) or
other devices at anydistance fromthelasertransmitter or EDFA.

ALWAYS

read the product data sheet and the laser safety label before powering the product
Note theoperation wavelength, optical outputpower and safetyclassifications. If safetygoggles or
other eye protection are used, becertain that the protection is effective at the wavelength emitted
by the device undertest applying power.

ALWAYS

connect a fiber to the output of the device power is applied. Power should
never be appliedwithout an attached fiber.Ifthe device has aconnector output, a connector should
be attached that is connected to a fiber. This will ensure that all light is confined within the fiber
waveguide, virtually eliminating allpotential hazard.

The OTEA-CO-B EDFA contains no user serviceable parts. There is exposed high voltage inside
this unit. Only authorizedfactory servicetechniciansshouldopen the unit with power applied.

The OTEA-CO-B EDFA is designed for indoor use only. Direct exposure to moisture must be
avoided. Ifyouhavequestions about laser safety procedures,please call Olson Technology before
powering your product. The fiber amplifier is sensitive equipment. Do not open the case of the
amplifier to avoid damaging the internal component devices. Opening the case of the amplifier
without the written permissionof OlsonTechnology,Inc., will void the warranty.

Operate the EDFAonly with the proper optical fiber installed in

NEVER

.

magnifying glasses microscopes,etc.

BEFORE

BEFORE

HIGH VOLTAGE

SHOCK HAZARD

.

!

AVOID

.

INTRODUCTION

Olson Technology, Inc. provides a wide range of Erbium Doped Fiber Amplifiers
(EDFA’s), for 1550nm HFC networks that feature low noise figure, stable output power
and excellentenvironmental stability. EDFA’s are comprised of two main parts:the gain
module andthe externalcontrol system.The gainmodule amplifies the optical signal in
1550nm wavelength band (1540-1560nm typically). It is made of high quality optical
components, and carefully designed to maximize overall performance. Low power

'

EDFA s may only have a single pump, while high power units can have up to three
pumps. Theexternal control system allows the operator toensure that the gain module
is working optimally Controlled by microprocessor it monitors the states of the gain
module and adjusts all the parameters to ensure a stabilized output power of the gain
module. This system also provides warnings via the front panel indicator LED and a
digital display The LCD on the front panel shows the detailed working parameters of
the EDFA This information can also be accessed via the standard RS 232 interface
via an externalcomputer.

.-

.,

.

OPERATION PANEL DESCRIPTION

STATUS DISPLAY PANEL OPERATION

The microprocessor software monitors the function of a numberof systemparameters.
Press the ▼and▲buttons to displaykey working parameters sequentially.

Optical Input Power

- Input power: INPUT = display input power (dBm)

• Input power = +10dBm = >alarm

• Input power = -10dBm => display NO INPUT =>shut down the power supply of

the laser.

• Input power = 0dBm => reach fixed output power.

Optical Output Power

- Output: OUTPUT = display output power (dBm)

• Tolerance = ±0.2dBm

• No input = power supply of the laser will be shut down automatically => display

NO INPUT => NO OUTPUT

Laser Temperature

- Laser temperature: TEMP = laser temp is set to operate in the

range of 20-30°C

• if exceeded => LCD will display “READY” => red LED indicator will light, and the

power supply of the laser will shut down automatically.

Laser Bias

- Bias: BIAS = Bias is the key index of the laser, if it exceeds the fixed
range power supply of the laser, the power supply will be shut down automatically to
protect the laser.

Laser Heating/Cooling

- Cooling/heating: COOLING/HEATING = standard

temperature for laser 25°C

- Thermoelectric cooler 25°C

TEC

• At high ambient temperatures, the LCD will display => COOLING

• At low ambient temperatures, the LCD will display =>HEATING

Voltage

+5V Voltage: +5V READS… => ±0.5V alarm

-5V Voltage: -5V READS… => ±0.5V alarm

Serial Number
IP Address for RS-232 Connector

- Displays the serial number of the EDFA.

- The IP address code can be set by the

operator via the RS-232 connector on the rear panel.

DESCRIPTION OF STATUS ALARM

The front panelindicatorLED indicator maybered, green, oroff. Whenthe LED isgreen
the EDFA is operating properly. Whenthe LED is off, the unit is off. A red LED indicates
an alarm condition.The alarmcondition will be displayedon thedisplay panel.

With proper power supply, if the EDFAis functioning normally and the LED indicator is
red, the digital panel will display “READY KEY OFF. Turn on with the key. The display
shows KEY OFF for10 seconds,then the LEDindicator changesto green.

Pressing the STATUSbutton displays the followingparameters:

• Input power -10 dBm, display => NO INPUT; the EDFA cannot be turned on and

<

the LED isred.

• If any faultlisted above hasoccurred, there willbean alarm. Themicroprocessor will

shut down the laser automatically, and the digital panel will display the cause of the
fault.

• In order to protect the laser, there is a time-delay function. After turning the laser on

with the key, thelaserwillstart to workafter 10seconds.

NOTES ON OPERATION

The EDFAshould have good grounding and grounding resistance to 4 . According to

Ω
the international standard, on an AC three-wire plug, the middle wire is the grounding
wire.

The EDFAincorporatesa high performance, highreliability, switching powersupply with
over-voltage protection. Themicroprocessor monitors theoutputDC voltage. Ifthe fuse
blows, the unitshould bereturned to Olson forservice.

In order to keep the reflection loss to <-55dB, the EDFA uses SC/APC optical
connectors. Other connector types, such as FC/PC, cannot be used with the EDFA.
Keep the connectorclean wheninstalling the opticalcables. Clean itwith lint-free tissue
with anhydrous alcohol after several rounds of connection/disconnection from the unit.
NEVER clean theoptical connectorswith the unit powered!

Input

Optical
Splitter

Optical
Isolator

EDFA BLOCK DIAGRAM

Erbium-Doped Fiber

WDM

1550/980

1550/980-1490

WDM

Optical
Isolator

Optical
Splitter

Output

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

Input

Power

Detector

PD

Thermoelectric Cooler

Front Panel

Status Monitor

RS-232

Pump Laser

980nm

Average Power Control

Micro-Processor

CPU Control Unit

Pump Laser
980/1480nm

Thermoelectric Cooler

Status Alarm

Display

LCD/VFD

Typical Catv CNR Degradation

0

1234 5678910

EDFA Optical Input (dBm)

PD

Output
Power

Detector

MODELS AND OUTPUTS

Typical Models

# of Outputs

Output Power (dBm)

115

15

116

117

118

119

120

1

1

16

17

1

18

19

1

20

1

SPECIFICATIONS

Optical Characteristics (with SM 9/125µm Fiber)

Min Typ Max Units

Operating Wavelength 1540 1560 nm
Input Power Range -10 +10 dBm
Max. Alarm 10 dBm
Min. Alarm -10 dBm
Output Stability -0.3 +0.3 dB
Noise Figure (0dBm In) 4.5 5.0 5.3 dB
Noise Figure (6dBm In) 5.5 6.0 6.5 dB

<<<

<<<
Polarization 0.2 dB
PMD 0.5 ps
Reflection Loss 40 dB
Optical Connector SC/APC
Network Interface RS-232/RJ45

Electrical & Environmental Characteristics

Min Typ Max Units
Operating Temp. Range +5 +45 °C
Storage Temp. Range 0 +55 °C
Relative Humidity 10 90 %

1

P. S. Voltage +85 +264 V
P. S. Voltage -48 V
Power Consumption 50 W

121

122

1

1

21

22

NOTES:

1) Non-condensing.

AC

DC

123

124

221

419

1

1

23

1

24

21

4

2

19

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