Device Characteristics Modules
Covers fibre optic devices performance under different bias conditions. The modules have appropriate monitoring posts and circuit diagrams printed on top.

• LED Module
The module covers the V-I, P-I characteristics and the conversion efficiency
• Photo Diode Module
The user works with a PIN photo diode under different bias conditions. (Zero, Forward and Reverse Bias). The module also covers quantum efficiency, responsivity and leakage characteristics of a PIN photo diode
• APD Module
The module covers characteristics of APD operation under Zero Bias, Reverse Bias and Gain Bias. The user understands device performance under different bias conditions, plots the device characteristics and calculates the multiplication factor, quantum efficiency, responsivity
• LASER Diode Module (LD Module)
The module trains the user on device characteristics (P-I & V-I), Setting up of Free Space Line of Sight Link, effect of interferences & jamming of link by another source

OTDR Set Up
The OTDR set up trains users on OTDR operation, at a fraction of a commercial OTDR cost. The user configures the OTDR and works with several fibre events provided. The manual explains the concepts, the functionality of different blocks, different experiments and the commercial applications. 

Modular fibre events with connector and adaptor at various distances are part of the lab to work with experimental OTDR. Other events can be added on request to capture the fibre bending effect, splice loss etc.

OFT – Optical Fibre and Digital Communication Trainer
Used for demonstration, training and experimentation in basic and advanced concepts. It spans:

• Principles of fibre optic communications
• Multimode Fibre Characteristics – including NA, Attenuation & Bending Losses, EMI, and Pulse Broadening
• Digital Communication Concepts like TDM, Voice Coding, Clock Recovery, Marker in TDM and False marker generation
• Study of 64Kbps transmission concept which is common in serial communication systems like ISDN/E1/T1

Fibre Optic Links
Plastic and Glass fibre links for experimentation and interfacing to other digital circuits:

• Plastic fibre analog link – 880nm, 2MHz
• Digital receiver for free space link – 5Mbps
• Multimode glass fibre digital link – 850nm, 2Mbps, 100m
• Single-mode glass fibre digital link – 1300nm, 34Mbps, 500m – optional

Specially designed PCBs are provided for plastic fibre analog and digital links. These come with self explanatory schematic diagram and observation posts for study of links. The System consists of a completely assembled sample module and five sets of reusable PCBs (with sockets for component insertion)

• Measurement of Numerical Aperture
• Losses in Optical Fibre – Attenuation & Bending losses
• Electromagnetic Interference
• Pulse Broadening in Fibre Optic Communication

• Losses in Optical Fibre – Attenuation & Bending loss
• Clad Mode Stripping study

• Laser Diode P-I & V-I characteristics
• Line of Sight link (650nm)
• Live data – free space line of sight link with OFT

• APD at Zero Bias
• APD at Reverse Bias
• Multiplying effect of APD
• Leakage characteristics of APD

• LED P-I & V-I characteristics

• PD at Reverse Bias (responsivity, quantum efficiency)
• PD at Forward Bias
• PD at Zero Bias
• Leakage characteristics of PD

• Building blocks of OTDR – allows building an OTDR with essential components and studying its basic operations
• Study of optical fibre events using the constructed OTDR and standard OTDR available

• Study of 64Kbps transmission concepts
• Time Division Multiplexing
• Manchester coding
• Marker in TDM and False marker generation
• PCM voice coding
• Asynchronous data transfer

• Multimode digital fibre link – Sensitivity and Power budget
• Bit Rate measurement and study of AC coupled digital link

• System study
• Bandwidth