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Graded-index separate confinement double heterostructure (GRIN-SCH) InGaAs/GaAs lasers with various cavity lengths were tested in the lab. The 100m wide oxide strip lasers consists of two pairs of 10nm In0.2Ga0.8As quantum-well (QW). The barriers of the lasers are 10nm GaAs (undoped). The lasers give a lasing wavelength around 970nm at room temperature. The refractive index of the active InGaAs layer is 3.4.
A box contains 50 diodes of which 10 are known to be bad. If the first diode drawn from the box was good, what is the probability that a second diode drawn will be good
The effective inductance and capacitance of a faulted system as viewed from the contacts of a breaker are 2.5 mH and 600 pF respectively. Determine the restriking voltage across the breaker contacts when a fault current of 150 amps is chopped.
Consider a uniformly charges cylinder (radius R, height H, charge density ρ). Imagine it at the center of a cube (sides of length L). Calculate the flux of the electric field created by the cylinder through the surface of the cube.
Consider a linearly graded Si p-n junction. Find a relation for the potential across the depletion region. Hint: Start from equation 29 in chapter 3 of the text book. Integrate the electric field to find the potential.
Suppose the above device is to be used as an 8-way power splitter (let's say only the top-most input is used). Let the input power be P. Assuming a cross-coupling coefficient of f and ignoring excess losses, what are the possible power levels Pi a..
Design a 300W PFC BL-Zeta converter operating in DCM (Output Inductor) to maintain a DC link voltage of 100V with percentage ripple of 4%. The permitted ripple in the input side inductor and intermediate capacitor is given as 20%.
In a Built in Self Test, for a combinational logic system, what are the advantages of using a counter instead of an ALFSR to generate testing vectors for 2 cases.
As a project manager on a product development team for a fast responding digital thermometer useable in high temperature applications (degrees C), you are asked to create a product development plan that addresses items
Determine the power transmitted through the shaft of a car when the torque applied is 200 N · m and the shaft rotates at a rate of 4000 revolutions perminute (rpm).
The temperature decreases by 33.8 C°. Determine the fractional decrease L/(LSilver + LGold) in the rod's length, where LSilver and LGold are the initial lengths of the silver and gold rods.
A car battery has an open-terminal voltage of 12 V and an internal resistance of 0.02 . If the car starter has a resistance of 0.10 in series with the batter, what is the resulting terminal voltage on the starter
A linear time-invariant system has a transfer function with a direct-current gain equal to 2 and a phase angle of 45°. What is the response of this system to the input x(t) = 4 cos(2t)
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