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copper vapor laser is a gas laser that operates at a gas temperature of ab 500 °C. The atomic mass number of Cu is 63. For the emission of a cop rapor laser at 510.5 nm, the upper laser level relaxes almost entirely radiativ only to the lower laser level with t, = td = Tsp = 500 ns. The lower laser le s a long-living metastable state that relaxes nonradiatively with a lifetime he order of t1 = 10 µs. Find the ho linowidthe due to noturel breadening and lifeti

copper vapor laser is a gas laser that operates at a gas temperature of ab 500 °C. The atomic mass number of Cu is 63. For the emission of a cop rapor laser at 510.5 nm, the upper laser level relaxes almost entirely radiativ only to the lower laser level with t, = td = Tsp = 500 ns. The lower laser le s a long-living metastable state that relaxes nonradiatively with a lifetime he order of t1 = 10 µs. Find the ho linowidthe due to noturel breadening and lifeti

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A copper vapor laser is a gas laser that operates at a gas temperature of about 1500 °C. The atomic mass number of Cu is 63. For the emission of a copper vapor laser at 510.5 nm, the upper laser level relaxes almost entirely radiatively only to the lower laser level with t2 = td = tsp = 500 ns. The lower laser level is a long-living metastable state that relaxes nonradiatively with a lifetime on the order of t1 = 10 µs. a. Find the homogeneous linewidths due to natural broadening and lifetime broadening, respectively. b. Find the inhomogeneous linewidth due to Doppler broadening. c. Is the observed linewidth primarily homogeneously or inhomogeneously broadened? What is the expected lineshape? d. Explain why the copper vapor laser is a three-level system though the lower laser level is not the ground state. e. Give an explanation to account for the fact that a copper vapor laser cannot be operated in a CW mode but can only be pulsed.
Transcribed Image Text:A copper vapor laser is a gas laser that operates at a gas temperature of about 1500 °C. The atomic mass number of Cu is 63. For the emission of a copper vapor laser at 510.5 nm, the upper laser level relaxes almost entirely radiatively only to the lower laser level with t2 = td = tsp = 500 ns. The lower laser level is a long-living metastable state that relaxes nonradiatively with a lifetime on the order of t1 = 10 µs. a. Find the homogeneous linewidths due to natural broadening and lifetime broadening, respectively. b. Find the inhomogeneous linewidth due to Doppler broadening. c. Is the observed linewidth primarily homogeneously or inhomogeneously broadened? What is the expected lineshape? d. Explain why the copper vapor laser is a three-level system though the lower laser level is not the ground state. e. Give an explanation to account for the fact that a copper vapor laser cannot be operated in a CW mode but can only be pulsed.
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