The first experiment directly measuring the bandwidth of a laser (in this case a continuous wave Pb 0 88 Sn 0 12 Te diode laser) was carried out in 1969 The laser, operating at 0 10 600 nm, was heterodyned with a CO 2 laser, and bandwidths as narrow as 54 kHz were observed Compute the corresponding frequency stability and coherence length for the lead tin telluride laser

Question: The first* experiment directly measuring the bandwidth of a laser (in this case a continuous-wave Pb 0.88 Sn 0.12 Te diode laser) was carried out

The first* experiment directly measuring the bandwidth of a laser (in this case a continuous-wave Pb_0.88Sn_0.12 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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