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2. (a) (1) States the two parameters for designing the emission wavelength of a laser and explain how the two parameters
Posted: Sun May 15, 2022 3:41 pm
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- 2 A 1 States The Two Parameters For Designing The Emission Wavelength Of A Laser And Explain How The Two Parameters 1 (98.01 KiB) Viewed 53 times
2. (a) (1) States the two parameters for designing the emission wavelength of a laser and explain how the two parameters affect the emission wavelength. (6 marks) (ii) State two methods to make a laser become single wavelength emission. (2 marks) (iii) What are spontaneous and stimulated emissions? State their differences. (6 marks) (iv) Give the reasons why VCSELs typically has low threshold current and low output power. (2 marks) (b) Describe the possible radiative and non-radiative recombination processes of excited electrons and holes with the assist of plotting diagrams. (9 marks)