Optical Communication Practice Test 4

1. QC lasers ______________ the performance characteristics.

2. 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.

3. When did the non-semiconductor laser developed?

4. The spectral width of emission from the single mode device is __________

5. Lasing obtained in __________ when 191 mW of pump light at a wavelength of 0.477 μm is launched into laser.

6. In Nd: YAG lasers, the maximum doping levels of neodymium is ____________

7. What is the purpose of wavelength dispersive element is LEC lasers?

8. Auger current is mostly ___________________ for material with band gap providing longer wavelength emission.

9. Line-width narrowing is achieved in DFB lasers by a strategy referred as _______________

10. How many techniques can be used to increase the injection cavity length?