OPERATING MANUAL OAS 1501-16 A OAS 1501-16 B O p t i C a T 1 5 0 0 Series Erbium-Doped Fiber Amplifier Richard Hirschmann GmbH & Co Business department Interactive Broadband Networks Stuttgarter Strasse 4 - 51 D - 72654 Neckartenzlingen
Disclaimer Every attempt has been made to make this material complete, accurate, and up-to-date. Users are cautioned, however, that Richard Hirschmann GmbH & Co reserves the right to make changes without notice and shall not be responsible for any damages, including consequential, caused by reliance on the material presented, including, but not limited to, typographical, arithmetical, or listing errors.
1. GENERAL INFORM ATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Scope of this M anual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.
1. GENERAL INFORMATION 1.1 S cope of this Manual This document describes the form, fit, and function of the OptiCaT 1500 Series Erbium-Doped Fiber Amplifier (EDFA) and all acceptable standard options. • Installing the unit • Operating the unit • Setting up the unit to suit individual needs • Troubleshooting • Theory of operation • Repair Policy 1.2 General Description The OptiCaT 1500 EDFA is an optical amplifier operating in the 1550 nm wavelength region.
Figure 1-1 OptiCaT 1500 EDFA Unit 1.4 Features and Advantages of the 9100 S eries • Models available with a wide range of optical output power. • Low Noise Figure. • User adjustable output power. • Front panel display of status and configuration of the Optical Amplifier. • LED status indicator. • Remote status monitoring function via RS485 Interface. • Wide range of electrical power options available. • High reliability and a 1-year warranty. 1.
1.6 Functional Description Front Panel: On/Off Key LED indicator Display Activate/De-activate optical gain Indicates status of unit (Normal, Warning, or Alarm) Alphanumeric Dot Matrix LED, 1 line provides status and configuration information. up/down/select push buttons are used to select menu items for display and to vary user adjustable parameters.
Without proper maintenance practices, fiber optic systems will fail to function properly. These performance degradation’s take many forms: • Poor analog transmission quality • Digital bit error rates increase • Reduced optical power • Receiver input power outside optimum operating range • Dirty connectors may cause damage to their mated counterparts It is recommended that RIFOCS Corporation 945/946 fiber optic connector cleaning system be used for cleaning the optical connectors. 1.
Calls attention to a procedure or practice which, if ignored, may result in damage to the system or system component. Do not perform any procedure preceded by a CAUTION until described conditions are fully understood and met. 1.11 Electrostatic S ensitivity Observe electrostatic precautionary procedures. (ESD = ElectroStatic Discharge) The OptiCaT 1500 amplifier provides highly reliable performance when operated in conformity with its intended design.
2. INS TALLATION To install the equipment, perform the following steps, each of which is described in detail in the rest of this section. • Step 1. Examine the equipment for loss or damage that may have occurred during shipping. • Step 2. Prepare the operating environment. • Step 3. Install the OptiCaT 1500 EDFA • Step 4. M ake electrical connections • Step 5. M ake RF connections • Step 6. M ake optical connections 2.1 Examine the Equipment • Carefully unpack the equipment.
2.2.2 Equipment Mounting Requirement The OptiCaT 1500 EDFA is 1 unit high and is designed to fit EIA standard 19 inch equipment cabinets. Hirschmann GmbH & Co recommends 1.75 inch space above and below the unit. 2.2.3 Power Requirements Depending on the option purchased, the unit can be powered from AC, unregulated DC, or regulated external DC. If AC power is present, it will be the main supply. The DC inputs can be configured as a backup or as the main supply (if AC is not present).
Note: M ake heavy gauge wire connection between ground stud and chassis ground before making electrical connections. 21 - 60 V DC input Regulated Input +24 V Gnd Figure 2-1 DC Power Connections 2.5 Make Optical Connections Ensure optical input signal is present. M ake sure all connectors are clean before installing. Connect the input and output fiber cables to the appropriate connectors on the rear of the unit.
3. OPERATION The user front panel interface consists of a 16 character segmented LED display, a status indicating LED, and 3 push buttons. The status indicating LED indicates whether the conditions are normal, or whether a warning or alarm is active. The LED lights green, amber, or red, respectively to indicate these conditions. The three push buttons are marked with an up arrow (up), a down arrow (down), or “select” (select, or enter).
3.2 Rear Panel Connections Power entry module (If AC ordered) On/Off switch with standard 3-pin IEC AC power socket integrated fuse holder Make sure the Key switch on the front panel is in the “Off” position before turning the power on switch to the “On” position.
not pass its self-test because of a warning or an alarm condition, then the EDFA changes the LED and display as described in table 4-1 in Section 4 Troubleshooting. During normal operation, the EDFA displays “1550 EDFA.” When the “select” button is pressed, the display changes to show system information according to the menu structure of Fig. 3-1. By repeatedly pressing “select,” the display cycles through the menu headings “Optical,” “Pump 1,” “Pump 2,” on up to “Pump 4 if installed,” and “System.
1550 EDFA Optical Pump 1 Pump 2 System P in = xx.xdBm I bias 1 = xxxmA I bias 2 = xxxmA SN = xxxx P out = xx.xdBm I TEC 1 = x.xxA I TEC 2 = x.xxA Address = xxxxx Pwr Adj = xx.xdBm Temp 1 = xxC Temp 2 = xxC Update Adj = Y/N Figure 3-3. The Display Menu Structure Heading Item Description Optical Pin=xx.xdBm Pout=xx.xdBm Pwr Adj = xx.xdBm Update Adj = Y/N I bias 1=xxxmA I TEC 1=x.xxA Temp 1=xxC I bias 2=xxxmA I TEC 2=x.xxA Temp 2=xxC I bias 3=xxxmA I TEC 3=x.
4. TROUBLES HOOTING There are two types of faults - warnings and alarms. Warnings are conditions that indicate problems, but do not necessarily result in a total loss of service. Alarms are conditions that indicate a total loss of service. Based on the condition of the alarm or warning, different indicators will be affected. These are described below. 4.
Note: When the keyswitch is in the “off” position, the LED is amber and the display reads “Stand By” to indicate the standby mode EDFA Condition Power on/key on Display Readout 1550 EDFA LED Color Green Description normal operation Warning Power on/key off Standby Amber Initialization Start Up Amber Warn: Ibias Y hi Amber Warn: pump Y cold Amber Warn: pump Y hot Amber pump laser temperature high Input optical power low, key on Warn: input low Amber low 1550nm input power, still operate a
5. THEORY AND BLOCK DIAGRAM The OptiCaT 1500 EDFA block diagram is shown in Fig 5-1. Depending on model, isolators are used at both the input and output to prevent optical reflections from feeding back into the amplifier which can degrade performance. Tap couplers at both the input and output are used to monitor the power of the incoming and amplified output signal. Gain occurs in a section of Erbium doped fiber which is “pumped” by light from 980 nm lasers.
6. MODEL S PECIFICATIONS Parameter OAS 1501-16 A Output Power Noise Figure (max) 1) Operating Wavelength Polarization Sensitivity Input Optical Return Loss Output Optical Return Loss Operating Temperature Power Consumption (max) 16 dBm 5.5 dB OAS 1511-16 B 16 dBm 5.0 dB 1540 - 1560 nm <0.2 dB >50 dB No spec >50 dB 0 - 50 C 40 W 1) : At 6 dBm input power Table 6-1.
