Optical Communication Mock Test 4

1. Dot-in-well device is also known as __________

2. The parameters having a major role in determining threshold current of efficiency of injection laser are ___________

3. In a three level system, the threshold power decreases inversely with the length of the fiber gain medium.

4. Fiber based lasers provide diffraction-limited power at higher levels than solid-state laser.

5. In multimode injection lasers, the construction of current flow to the strip is obtained in structure by __________

6. The external power efficiency of an injection laser with a GaAs is 13% having band gap energy of 1.64 eV. Determine external power efficiency.

7. _________________ is a technique used to render the non-conducting material around the active cavity by producing permanent defects in the implanted area.

8. Intensity of output from semiconductor injection lasers leading to optical intensity noise is due to __________

9. The thulium doped fiber laser when pumped with alexandrite laser output at 0.786 μm, the laser emits at ___________

10. _________________ laser can be produced when a coupler section is introduced between the amplifier and phase sections of a structure.