please help me!
A photodetector has a responsivity of 0.844 A/W at 1500 nm. (a) Determine the
quantum efficiency. (b) Determine the responsivity for incident wavelengths 1300
and 800 nm.
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Problem 3 (25 points) A silicon photodetector has an internal photo responsivity of 0.5 A/Wt wavelength of 850 nm. When photons of wavelength 850 nm are incident normally on this photodetector, so...
Problem 3 (25 points) A silicon photodetector has an internal photo responsivity of 0.5 A/Wt wavelength of 850 nm. When photons of wavelength 850 nm are incident normally on this photodetector, some photons are reflected back and some photons penetrate to the detection region and are absorbed by the photodetector. (a) The index of refraction of silicon is 3.45. If the electric current measured by this photodetector is 20 mA, what is the incident optical power? (b) Silicon has a...
Photodiode Detectors
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(a) Define the responsivity p and quantum efficiency n of a photo-detector and show that they...
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A high-speed germanium PIN photodiode has a depletion width of 10 _m and a reverse-bias voltage of 10 V. The hole mobility in Ge is _ 0.2 m2/(Vs), the saturation velocity is _ 7 × 104 m/s, and the refractive index at 1300 nm is _ 4.3. (a) Determine the transit time limit to the response time, and calculate the corresponding 3 dB electrical bandwidth. (b) If light of wavelength 1300 nm is detected, determine the fraction of incident light...
help me create a molecule Frequency (cm1) 5000 4000 3000 2500 2000 1700 1500 1400 1300...
help me create a molecule
Frequency (cm1) 5000 4000 3000 2500 2000 1700 1500 1400 1300 1200 1100, 1000 900 00 T 800 700 8910 1 12 Wavelength () 13 15 Cl 呎
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Q.14 a) i...
Problem 3 (25 points) A silicon photodetector has an internal photo responsivity of 0.5 A/Wt wavelength of 850 nm. When photons of wavelength 850 nm are incident normally on this photodetector, some photons are reflected back and some photons penetrate to the detection region and are absorbed by the photodetector. (a) The index of refraction of silicon is 3.45. If the electric current measured by this photodetector is 20 mA, what is the incident optical power? (b) Silicon has a...
(a) Define the responsivity p and quantum efficiency n of a photo-detector and show that they are related by p= ne lambda/hc (b) For 0.92 eV photons, a photodiode has responsivity 0.35 AN. Calculate the quantum efficiency of the photodiode.
Question 3: (8 points) (a) A photodetector has an effective area of 6x102 cm. It is illuminated with 700nm laser light that has an intensity of 2.5mW/cm². Assuming each three photons generate one electron-hole pair on average, calculate the generated photocurrent. (b) A 40 nW optical power at 1555 nm is incident on APD. The APD has refractive index of 3.5, and its multiplication factor is 12. It is efficiency without avalanche breakdown is 80%. Find: a) The responsivity of...
Cesium metal is to be used as the photocathode material in a photoemissive electron tube because electrons are relatively easily removed from a cesium surface. The work function of a clean cesium surface is 1.9 eV. What is the longest wavelength of radiation which can result in photoemission? a. b. If blue radiation of wavelength 450 nm is incident onto the Cs photocathode, what will be the kinetic energy of the photoemitted electrons in eV? What should be the voltage...
help me create a molecule
Frequency (cm1) 5000 4000 3000 2500 2000 1700 1500 1400 1300 1200 1100, 1000 900 00 T 800 700 8910 1 12 Wavelength () 13 15 Cl 呎
Q.14 a) i A silicon p-i-n photodiode incorporated into an optical receiver has a quantum efficiency of 60 % at a wavelength of 0.9 um The dark current is 3 nA and load resistance is 4 Kn. The incident optical power is 200 nw and the receiver bandwidth is 5 MHz. Determine 1) Mean square quantum noise current, 2) Mean square dark current and 3) Mean square thermal nosie current at a temperature of 20 °C [8]
Q.14 a) i...
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