- Sagnac Effect
- Interference
- Half and quarter wave plates
- HeNe Ring Laser
- Beat Frequency Detection
- Optical 90° phase shifter
- Single Mode Etalon
- Linear and Elliptical Polarization
- Direction Discrimination
- Lock-In Effect
- High Precision Angle Measurement
- Active Laser Gyroscope
- Processor Controlled Rotation
- Quad Frequency Counting