The first* experiment directly measuring the bandwidth of a laser (in this case a continuous-wave Pb 0.88
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The first* experiment directly measuring the bandwidth of a laser (in this case a continuous-wave Pb0.88Sn0.12 Te diode laser) was carried out in 1969. The laser, operating at λ0 = 10 600 nm, was heterodyned with a CO2 laser, and bandwidths as narrow as 54 kHz were observed. Compute the corresponding frequency stability and coherence length for the lead-tin-telluride laser.
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