10. Optical Gain and Lasers

Lasers

Optical gain

  • Rate equations for two-, three- and four- level systems
  • Population inversion and optical amplification

Laser oscillation

  • Lasing condition
  • Gain clamping (homogeneous & inhomogeneous line)
  • Frequency pulling

Reading assignments

Chapter 5, § 5.7- Gain saturation in homogeneous media.

Chapter 6, §6.0 - Introduction, §6.1 - Fabry-Perot laser, §6.2 - Oscillation frequency, §6.3 - Three and four -level systems, §6.4 - Power in laser oscillators

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