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Explain about the Homojunction Laser in brief.
Homojunction Laser:
Assume that GaAs be doped with T providing n-type material and with Ge providing p-type material. In forward bias (p-type side is made positive), the majority carriers that is, the electrons into n-side and the holes into p-side are injected across the depletion area into both directions to create a population inversion into a narrow active region. The light produced through radioactive recombination across the band gap is confined within this active region.
Typical output optical power verses diode current (f) characterises and the corresponding output spectrum of a laser diode.
Define the term intrinsic stand-off ration in UJT. Ans: Intrinsic Stand-off Ratio: Equivalent circuit of a UJT is demonstrated in fig. (a). Emitter diode forms the junctio
Draw the energy band diagrams of a tunnel diode for different biasing conditions. Band Diagrams of a Tunnel diode: The energy band diagram for a heavily doped unb
Explain the term poly elastic and give some of example.
If two forces P & Q act at such an angle that the resultant force r=p. Then show that if P is doubled the new resultant is at right angle Q and it's value is ( 4P 2 -Q 2 ) 1/2
tell me about the terms of temporal coharence
Tell some examples of Like and Unlike Parallel Forces.
How can time delay between the different modes be reduced? The time delay between the various modes can be reduced when (a) the rays traveling off axis to the fiber are spee
Angle of Minimum Deviation: The angle of deviation has least value when incident ray and emergent ray make equivalent angle with the normal. The value of angle of deviation is
3 scenarios: You have an object such as a jar, and you submerge it under water to 50m depth. (Every 10m down increases pressure by 1 bar, thus the pressure is 5 bar). Scenario 1:
Gauss' law for magnetic fields (K.F. Gauss) The magnetic flux by a closed surface is zero; no magnetic charges present; in differential form, div B = 0.
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