Week #

Topic

1

Basic structure of semiconductor lasers and its properties – cavities, gain, modes, and threshold. Energy bands in direct semiconductor material

2

PN junction, Vegard law, currents in forward bias

3

Light-matter interaction is semiconducting materials. Compound semiconductors, the double Heterostructure.

4

Generation and recombination processes, Einstein relations.

5

Electronic transition between states, spontaneous and stimulated emission, density of states.

6

Emission efficiency, current-gain relations, gain clamping, L-I curve.

7

Waveguides for semiconductor lasers, asymmetric slab, gain guidance.

8

Two dimensional waveguides, effective index approach, 2D modes.

9

Distributed feedback lasers: DBR lasers, phase shifted DFB lasers

10

SC laser rate equations, Transparency, lasing threshold.

11

SCL dynamics – relaxation oscillations, steady-state, lasing spectrum, frequency pulling

12

Linewidth enhancement, SCL modulation (direct), maximal bandwidth.

13

QW lasers.