Erbium Doped Fibre Amplifier Training System
The Benchmark ETS is an EDFA (Erbium Doped Fibre Amplifier) Training System. Erbium Doped Fibre Amplifier (EDFA) is an optical amplifier that amplifies optical signals sufficiently enough to cover several tens of kilometers without any need for conventional repeaters. Moreover, as it works in the same optical domain, it avoids the need for several stages of signal conversion with their associated problems. Consequently, EDFA
finds extensive use in the fibre backbone.
The Benchmark ETS – EDFA Training System – addresses the need for a training setup that shows the building blocks of a typical EDFA as well as the characteristics of such blocks. All the blocks are given with proper input and output connections such that they can be configured in different modes of operation, such as co-directional and counter-directional operations. This modular approach also facilitates study of individual block characteristics wherever possible.
- List of Items
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ETS
Erbium Doped Fiber (spliced) - 3 different lengths Erbium Doped Fiber (un spliced) - 1 no Pump Laser 980nm, 100mW - 2 nos Optical isolator – 1550nm - 1 no Wavelength selective coupler (WDM), 980nm/1550nm - 1 no Tap coupler - 980nm, 99:1 - 1 no Single mode Patch cords - 8 nos FOSM -U1000e 1550nm DFB LD unit - 1 no Fiber Bragg grating - 1 no Optical Circulator - 1 no Optical Attenuator 1550nm, 980nm, 1550nm (Var) - 1 no O/E Converter for EDFA - 1 no FOPM-102-01 Fibre Optic Power Meter - 1 no Optional - Module 001
FOSM-D600 LD Driver - 1 no FOTX-610 LD Modulator - 1 no FORX-500 Optical Receiver - 1 no - Experiment Topics
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Experiment Topics Understanding the operating principles of EDFA
- Working of EDFA in Co-Directional, Counter-Directional Pumping
- Gain
- Power Conversion Efficiency
- Quantum Conversion Efficiency
- ASE-ASE noise, Signal-ASE Beat Noise
Understanding the EDFA Building blocks
- Wavelength Selective couplers – 980nm/1550nm
- Tap coupler for 980nm – 99:1
- Optical Isolators – 1550nm
- Optical Circulators
- Fibre Bragg Grating (FBG)
- Optical attenuator – 1550nm
Characteristics study of EDF
- Measurement of Absorption Co-efficient
- Mode field diameter mismatch in EDF
Characteristics study of Pump Laser 980nm
- I-P Curve
- Knee Current
Characteristics study of Signal DFB Laser 1550nm (Module 001 required)
- I-P Curve
- Knee Current
- Spectrum [Optical Spectrum Analyser (OSA) also required]
Factors contributing to EDFA Gain – Pump Laser power, length of Erbium Doped Fibre (Module 001 required)
- Large and small I/P signal Vs Gain
- Pump laser power Vs Gain
- EDF length Vs Gain
- Pump saturation
- Signal saturation
Setting up a Fibre Optic link with EDFA
- 1550nm, 34Mbps Data rate (Module 001 required)
- Setting up a digital link (using the Benchmark OFT)
Fibre Ring laser (OSA required) Noise Figure measurement (OSA required) - Specifications
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Specifications Pump Laser
Wavelength
Output power
Output power – adjustable
DFB Signal Laser
Wavelength
Output power
SMSR
EDF
C-Band single mode fibre Max data rate
Peak absorption near 1530nm
Peak absorption near 980nm
Second mode cutoff
Optical Isolator
Operating wavelength
Isolation
Insertion loss
Wavelength selective coupler (WDM)
Operating wavelength
Isolation
Insertion loss
Optical Circulator
Number of ports
Operating wavelength
Isolation
Insertion loss
Fibre Bragg Grating
Bandwidth
Reflectivity
980nm
160mW (typ)
1µW to 100mW
1550nm
1mW (typ)
>30dB
2 Mbits/sec (NRZ)
6.0 ±1dB/m
≥ 3.0dB/m
920nm ±50nm
1550nm±1dB/m
≥ 3.0dB/m
920nm ±50nm
19dB (typ)
1dB (typ)
3
1530-1570nm
35dB (typ)
1dB (typ)
20nm
90% – 95% (typ)
*Specifications subject to change without notice
- Ordering information
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Ordering information
- ETS – EDFA training system
- Module 001
