EF-970
Fibre Optic Communications Training System
Technology
EMITTER MODULE
The emitter kit for the simultaneous transmission of two
independent channels of up to 10 MHz, consists of the following
blocks:
Inputs
- Analogue (separate DC and AC).
- Functions generator (internal).
- Microphone.
- Digital (with possibility of inversion).
Emitter stage
- Channel 1.
- Channel 2, with actionable laser feedback.
Amperimeter
For adjusting photoemitter polarisation current
Photoemitters
526, 590, 660, 850, 1300 nm LED **. 650 nm Laser.
RECEIVER MODULE
Photo-detectors
- 1 mm Si PIN.
- 1mm InGaAs PIN **.
- 0.1 mm Ge APD (variable internal gain photodetector) **.
- 2.5 mm Si PIN.
Precision measurements channels
- 1 kHz, to prevent influence from external optical sources.
- Very low DC noise, for very precise measurements.
Receptor stages (with variable inverse polarisation)
- Analogue channel.
- Digital channel.
Optical power meter (dBm and mW), absolute/relative measurem.
Outputs
- Analogue (high or low impedance).
- Digital (TTL or RS-232).
- Speaker (internal) and headphones.
Fault simulator
CD-ROM SUPPLIED DOCUMENTATION
- User’s Manual.
- Training Manual.
- Teacher’s Manual.
PARTIAL LIST OF EXERCISES
EF-970
- Measuring optical power (suggested EF-970-E).
- Measuring the attenuation of an optical fibre. Insertion losses
method (suggested EF-970-E).
- Measuring the attenuation of an optical fibre.
- Spectral dependence of the attenuation of an optical fibre.
- Influence of ambient light.
- Connecting optical fibre using ST-ST adapters.
Measuring repeatability.
- Measuring the P/I characteristics of photoemitters.
- Measuring the optical stability of photo-emitters.
- Inverse voltage in photo-detectors.
- Measuring the V/I characteristics of photo-emitters.
- Frequency characteristics of photo-emitter modulation.
- Spectral dependence of photo-detectors (suggested EF-970-E).
- Bandwidth of photo-detectors.
- Transmission of analogue signals.
- Transmission of audio signals.
- Transmission of video signals.
- Transmission of digital signals.
- RS-232 transmission using optical fibres.
EF-970-E
- Optical power measurement.
- Measuring the attenuation of an optical fibre. Insertion losses method.
- Measuring the attenuation of an optical fibre.
- Spectral dependence of the attenuation of an optical fibre.
- Influence of ambient light.
- Connecting optical fibre using ST-ST adapters.
Measuring repeatability.
- Measuring the P/I characteristics of photo-emitters.
- Measuring the optical stability of photo-emitters.
- Measuring the V/I characteristics of photo-emitters.
- Frequency characteristics of photo-emitter modulation.
- Spectral dependence of photo-detectors.
- Inverse voltage in photo-detectors.
- Bandwidth of photo-detectors.
- Transmission of analogue signals.
- Transmission of audio signals.
- Transmission of video signals.
- Transmission of digital signals.
- RS-232 transmission by optical fibres.
OP-970-01 EXERCISES KIT
- Sensitivity of optical fibre to curvature (Macrocurves).
- Sensitivity of optical fibre to microcurvature.
- Radiation characteristics of optical fibre. Measuring numeric aperture.
- Measuring sliding in optical fibre connections.
- Characteristics of a fixed WDM device.
- Characteristics of a variable WDM device.
- Measurements with neutral optical fibres.
- Measuring insertion loss by the variable optical attenuator.
- WDM: multiplexation and demultiplexation.
- WDM system.
- WDM transmission.
- Transmission sensor.
- Reflection sensor.
- Liquid level sensor.
- Spectral dependence insertion loss by the variable optical
attenuator (EF-970-E needed).
- Comparing noise characteristics between PIN and APD
photodetectors (EF-970-E needed).
OP-970-02 CONNECTION KIT
- Connections with the optical fibre connector tool kit EF-970
or EF-970-E.
OP-970-03 MICROSCOPE
- Recommended for use with OP-970-02.
Recommended equipment:
Digital Oscilloscopes Series OD-4xx / OD-57x, OD-59x
TV signal generators GV-198, GV-698+, GV-798+
Optical power meter PROLITE-23
Optical spectrum analyser PROLITE-60
(**) This item is not supplied with EF-970 model
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