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Simultaneous pumping into both the upper and the lower laser levels. Consider a laser transition between two upper energy levels E1 and E2 in an atomic system similar to that discussed in this section. Assume, however, that there is pumping up from the ground level into both the laser levels E1 and E2, at pumping rates R1 and R2, respectively. Assume there is also a lser signal Wsig on the 2 to 1 transition, as in this section.
Solve the steady-state equations for the population different delta N21=N2-N1 in this system, and put the answer into a form that illustrates the dependence on pumping rates and on signal saturation. Discuss briefly (a) the pumping-rate and relaxation-time conditions for obtaining an inversion at all in this system; and (b) the form of the signal saturation behavior, and how it compares to simpler systems.
A linear-phase FIR filter should be designed with the ideal magnitude response shown in Figure 1 which represents an narrow band-pass filter. The lower cutoff frequency, fL , is 2,000 Hz, and higher cutoff frequency, fH , is 3,600 Hz.
a square plate of 50x50 pixels size placed at the origin of the x-y plane of a camera coordinate system is sheared vertically so that the point (49,0) moves to (49,10), and then rotated by 30 degrees.
The propagation law follows the free space up to a distance ofdbreak = 50 meters, and for larger distances the receive power is similar to(d/dbreak)-4.2. Transmit antenna gain is -7dB; the receive antenna gain is 9 dB. Compute the available fadi..
A digital system has a clock generator that produces pulses at a frequency of 8 MHz. What is the frequency of QB
What is the conclusion that can be made for linear,square-shapedcells and frequency reuse factors C=3 and C=4 interms of theirSIR(Signal-interference ratio).
A 160-ft-diameter parabolic antenna is driven by a 10-W transmitter at 4.3 GHz. Calculate its effective radiated power (ERP) and its beamwidth.
What are the transfer function and the impulse response of the system?
Design an up / down counter with four states (0, 1, 2, 3) using clocked J-K flip-flops. A control signal x is used as follows: When x = 0 the machine counts forward (up), when x = 1, backward (down).
Computer the following assuming each number is a two's complement number and indicate the inputs and final result in decimal. Also, indicate if the number overflows. a. 01 + 1011 b. 11 + 01010111 c. 1101 + 110 d. 01 + 10 e. 111 + 111111
A substance expands from V1 = 1 ft3 to V2 = 6 ft3 in a constant-pressure process at 100 lbf/in2. The initial and final internal energies are U1 = 40 Btu and U2 = 20 Btu, respectively.
A volume is divided into two equal parts by a partition. The left volume has N atoms. The atoms have a mass m. A hole of area A is made in the partition at time t=0 A)Develop an expression for the number of white atoms on each side of the partition..
Mobile IP was intended to work with legacy correspondent hosts and legacy applications. However, some advantages may be gained if correspondent hosts are aware of mobility in certain ways.
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