The active layer of E-LED is heavily doped with

Related MCQs

• The Nd: YAG laser is costlier than earth-doped glass fiber laser. State whether the following statement is true or false
• Which of the following co-dopant is not employed by neodymium and erbium doped silica fiber lasers?
• Which of the following co-dopant is not employed by neodymium and erbium doped silica fiber lasers?
• The rare-earth-doped fiber lasers have spectral line-width in the range of _________________
• The thulium doped fiber laser when pumped with alexandrite laser output at 0.786 μm, the laser emits at
• The diode-cladding-pumped Erbium praseodymium-doped fluoride device operates at wavelength.
• The active layer composition must be adjusted if a particular center wavelength is desired.State whether the given statement is true or false.
• An injection laser has active cavity losses of 25 cm-1and the reflectivity of each laser facet is 30%. Determine the laser gain coefficient for the cavity it has a length of 500μm.
• The total efficiency of an injection laser with GaAs active region is 12%. The applied voltage is 3.6 V and band gap energy for GaAs is 2.34 eV. Determine external power efficiency.
• A particular laser structure is designed so that the active region extends the edges of devices. State whether the following statement is true or false.