Optical Communication Practice Test 4

1. In QC lasers, it is possible to obtain different output signal wavelengths. This can be achieved by ___________

2. Conventional cleaved mirror structures are difficult to fabricate with the cavity lengths below __________

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

4. The behavior of laser occurring when current is increased above threshold particularly is?

5. In the given equation, corrugation period is given by lλ_b/2N_e. If λb is the Bragg wavelength, then what does ‘l’ stand for?

6. How many sections are included in a sampling grating distributed Bragg-reflector laser (SG-DBR)?

7. A correct DH structure will restrict the vertical width of waveguide region is?

8. An MQW cascaded laser is more advantageous because of ___________

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

10. Replacing Sn with Eu, Cd or Ge in some _________________ the band gap.