ALS-FOC-02

 

FIBER OPTIC DIGITAL LINK TRAINER WITH POWER SUPPLY

 

INTRODUCTION

Optical communication has many advantages over the traditional electrical counterparts. It is insensitive to electromagnetic interference, it offers ground and voltage isolation between the transmitter and the receiver, it provides security from tapping and there will be no sparking at the connecting ends. This trainer uses LEDs in visible range (660 nM) as transmitter, fast PIN-Photodiodes as receiver. A Plastic Optic Fiber (POF) is used as the channel connecting light signal from the transmitter to the receiver. Each of the transmitter and receiver are placed in a PCB mountable plastic housing. A 2.2 mm aperture is provided to hold standard 1000 micron POF. No fiber stripping is required. Microlens is a part of the housing.

 

 

SPECIFICATIONS:
Sine and triangle singnal source with variable frequency and amplitude.
A switch to select sine or triangle signal and connect to the transmitting circuit.
A variable POT at the transmitter offers the intensity adjustment.
A switch is provide to select the optional receiver to be connected either to the power Measurement circuit or to the signal receive and regeneration circuit.
Built in 3 ½ digit display for measuring optical power in DB
PMMA Fiber patch chords.
Circular bends for bending loss measurement.
L-bends with scale and mount for numerical aperture measurement.

LED’s in visible range (660 nM) as transmitter, fast PIN-Photodiodes as receiver. A plastic optic Fiber (POF) to be used as the channel connecting ligh signal from the transmitter to the receiver. A 2.2 mm aperture is to be provided to hold standard 1000 micron POF.Micro lens to be part of the housing.

 

LIST OF EXPERIMENTS:

Study of characteristic of Fiber optic LED and photo Detector.
Measurement of numerical aperture.
Measuremtn of losses in optical fiber.
  • Propagation Loss.
  • Bending Loss.

 

FIBER OPTIC DIGITAL LINK TRAINER WITH POWER SUPPLY

 
SPECIFICATIONS:
Sine, triangle and square signal source.
    Sine wave signal with variable frequency and amplitude.
Pulse width and pulse position modulation and demodulation circuits.
Four channel time Division MUX and DEMUX circuits.
PC to PC COMMUNICATION THROUGH RS232
Optical Transmitter and receiver.
PMMA Fiber patch cords.
Patch chords for connecting electrical signals.

LED’s in visible range (660 nM) as transmitter, fast PIN-Photodiodes as receiver.  A plastic optic Fiber (POF) to be used as the channel connecting light signal from the transmitter to the receiver. A 2.2 mm aperture is to be provided to hod standard 1000 micron POF. Micro lens to be part of the Housing.

 

LIST OF EXPERIMENTS:

Pulse Width modulation, optical transmission, reception and Demodulation.
Pulse position modulation, optical transmission, Reception and Demodulation.
Time division Multiplexing optical transmission, reception and Demultiplexing.
PC to PC communication through PC serial port and fiber channel.