Solid State, Microwave & Fiber Optics Lab
Part I: Microwave experiments- Electromagnetic wave in confined and free space;
- Microwave equipment and techniques;
- Dielectric Resonator Oscillator and Gunn diode as microwave sources;
- PIN switch;
- Microwave frequency, power, and attenuation measurements;
- Cutoff frequency of a waveguide;
- Measurement of the voltage standing wave ratio and reflection coefficient;
- Impedance of a load, Use of the Smith Chart;
- Estimation of material dielectric constant;
- Antenna gain measurement;
- Beat frequency, Doppler shift radar.
Part II: Solid State experiments:
- I-V and C-V measurements of a diode;
- Temperature effect on a diode;
- Photogenerated carriers effect on a diode;
- Solar Cell;
- Doping profiles;
- Laser diode and LED characteristics;
- Measurement of L-I curve and emission spectrum;
- Hall effect; Hall mobility, Hall coefficient.
Part III: Fiber Optics experiments:
- Start from lightwave devices all the way up to the lightwave system.
- Basic theory of optical fiber;
- Attenuation due to scattering and absorption in optical fiber;
- Measurement of the numerical aperture and attenuation of optical fibers;
- LED as optical signal sources;
- Turn-on delay and modulation time constant; cutoff frequency;
- Photodiodes and phototransistors as receivers for optical communications;
- Quantum efficiency, responsivity, linearity, dark current;
- Signal loss in fiber optic communications;
- Index matching, losses due to core separation, axial misalignment and angular misalignment; injection and coupling loss;
- Data communications using a fiber-optic system;
- Direct amplitude modulation and pulse width modulation, dynamic ranges.