Across
- 2. Fermi level closer to conduction band
- 4. impurity give up an electron to the conduction band.
- 6. drawback of LED
- 7. perfect material containing no impurities
- 9. on which depletion width increases
- 11. region where radiative recombination takes place
- 12. source that compatible with SMF
- 13. does not exhibit catastrophic degradation
Down
- 1. population of upper energy level is greater than population of lower energy level
- 3. cavity has mirror at both ends
- 4. higher external power efficiency than the planar LED
- 5. geometry which provides optical confinement in vertical direction
- 8. desirable spectral width for optical source
- 10. plane of active region is perpendicular to fiber axis