EDUCATIONAL TRAINING SYSTEMS

Model:FO-1

FIBER OPTIC DESIGN TRAINER

 FO1

DESCRIPTION

  • This trainer is a proven three-component fiber optics kit, available in the market, comprises a 660 nm LED (SMA connectorised), a matching phototransistor (SMA connectorised) and a 1-meter 960/1000 micron step index PMMA fiber simplex cable, terminated with SMA connectors.
  • This kit facilitates experimenters and professional users to design a variety of fiber optics systems on their own, Conversion of existing electrical systems to FO systems is possible using this trainer which is supported by a wide range of low-priced optional transceiver modules for transmission of analogue, TTL, CMOS, video, FM and FSK signals.
  • Speeds over 100 KHz and distances in excess of 20 meters are possible with this trainer.
  • Instruction manual comes with Wiring diagram, circuit description and step by step procedure

SIMPLEX CABLE WITH PMMA FIBER USED IN THIS TRAINER

  • The simplex cable with PMMA fiber finds application for short distance analog and digital signal transmission.
  • The step index fiber has a large area of cross section and a high numerical aperture, facilitating easy coupling with transmitting and receiving devices.
  • The light is guided along a fiber of one millimeter approximately to distances of a few tens of meters.
  • The other main applications of PMMA fibers are in sensors light guides and displays.

SPECIFICATIONS OF SIMPLEX CABLE

Core Material PMMA (Polymethyl methacrylate)
Cladding Material Fluorinated Polymer
Fiber Structure Step index type
Core/Cladding Diameters 960 micron/1000 microns
Core Refractive index 1.492
Cladding Refractive index 1.405 to 1.417
Numerical Aperture 0.5 (typical)
Acceptance Angle 55-60
Attenuation at 660nm Typically 0.3 dB per meter
Jacket Material Polythene (black, 2.2 mm OD)

FIBER OPTICS 660nm LED USED IN THIS TRAINER

  • The fiber optics LED used in this trainer is a low-cost device.
  • Operating at 660nm, it couples 40 to 50 mw of power into a 1000 micron PMMA fiber.
  • The LED is terminated with an optical SMA connector (nickel-plated). The LED is suitable for speeds above 100KHz.

SPECIFICATIONS OF FIBER-OPTIC LED

Material Ga Al AS
Wavelength 660nm
Spectral Line Width 45nm
Forward Voltage Vf 1.7V to 10V
Reverse Voltage (Vr) 5 Volts
Capacitance 100 pf (approx.)
Forward Current (9max) 30 mA (avg.)
Optical Power 30-40mw-10mA
Turn-on-turn-off time  <800 ns
Termination SMA (905)
Electrical Leads Red sleeve is Anode, No sleeve is Cathode

FIBER OPTICS PHOTOTRANSISTOR USED IN THIS TRAINER

  • The fiber optics phototransistors used in this trainer has a responsively of 50 mA/mw of incident light at 660 nm, when coupled to a 1 mm PMMA fiber.
  • The device is terminated with an optical SMA connector nickel plated). The phototransistor is suitable for speeds upto 100 KHz.

SPECIFICATIONS OF FIBER OPTIC PHOTOTRANSISTOR

Peak Responsively 850 nm
Spectral Range 400 to 1100 nm
Dark Current 100 mA (max)
Spectral Response 50mA/mw-660 nm
CE Breakdown Voltage 30V (min)
EC Breakdown Voltage 5V (min)
Vce (sat) 0.2 V (typical)
Rise/Fall Time 5 ms (typical)
Connector SMA (905)
Electrical Leads Black sleeve is Emitter,No sleeve is collector

List of experiments

  • To demonstrate the numerical aperture of the PMMA Fiber cable.
  • To study various types of losses that occurs in optical fibers and measures the loss in dB coupling two optical Fibre patch cords.
  • To compute the co efficient attenuation per meter.
  • To find the relationship between the forward current of fibre optic LED and optical power output and determine the linearity of the device.
  • To determine the relationship between the optical input power Pin and the resultant photo current IP in an optical to electrical converter.
  • Evaluation of an AC intensity modulation system.
  • To study Transmission/Reception of digital signal using this trainer and plot the graph of transmitter frequency versus VO.

Features of the Trainer

Power supply

Voltage range : AC 100V - 230 V

Frequency range : 50 - 60Hz

Function Generator Sine / Square output
Housing It is housed in an elegant metal cabinet(CNC Machine finish)
Dimension 45cm x 45cm x 18cm
Weight 6kgs

This trainer is a glass-epoxy printed circuit board and all the symbols screen-printed on the front panel so that it enables the student to conduct the experiments easily

Accessories:

  • 2mm multi coloured moulded patch cords with daisying facility.
  • Computer simulated outputs and Step-By-Step detailed instructions are provided with the instruction manual.
  • Fiber optic cable, terminated with SMA connectors - 1 meter.
  • Mic.
  • Speaker.

            

         

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