Ruby laser contains a crystal length (4cm) with a refractive index of (1.78). The peak emission wavelength from the device is (0.55μm). Determine the number of longitudinal modes and the bandwidth of the net gai

Ruby laser contains a crystal length (4cm) with a refractive index of (1.78). The peak emission wavelength from the device is (0.55μm). Determine the number of longitudinal modes and the bandwidth of the net gai

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Question

A Ruby laser contains a crystal length (4cm) with a refractive index of (1.78). The peak emission wavelength from the device is (0.55μm). Determine the number of longitudinal modes and the bandwidth of the net gain.

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