7. A light emitting diode (LED) has a center wavelength λ = 1.31µm and a bandwidth AX= 40nm; given the speed of light in vacuum c = 3 x 10" m/s. What kind of device can you use to measure the coherence time? Calculate frequency bandwidth (in Hz); 1 4 Calculate the coherence time [in fs); (1 fs = 10 sec.); €€€
7. A light emitting diode (LED) has a center wavelength λ = 1.31µm and a bandwidth AX= 40nm; given the speed of light in vacuum c = 3 x 10" m/s. What kind of device can you use to measure the coherence time? Calculate frequency bandwidth (in Hz); 1 4 Calculate the coherence time [in fs); (1 fs = 10 sec.); €€€
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Transcribed Image Text:7. A light emitting diode (LED) has a center wavelength 2 = 1.31μm and a bandwidth AX=
40nm; given the speed of light in vacuum c = 3 x 10" m/s.
(1)
What kind of device can you use to measure the coherence time?
Calculate frequency bandwidth (in Hz);
/
Calculate the coherence time [in fs); (1 fs = 10 sec.);
1
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