Applied Photometry, Radiometry, and Measurements of Optical Losses by Michael Bukshtab

Author:Michael Bukshtab
Language: eng
Format: epub
Publisher: Springer Netherlands, Dordrecht

In each setting, the law of conservation of energy via detectors D1 and D2 detecting transmitted and reflected light for a cavity consisting of mirrors 1 and 2 irradiated by laser source S via beam splitter BS is:

(7.15a)

(7.15b)

Here I0 and IC are the intensity of light incident on and inside the resonator and IL, Iρ, and Iτ are the intensity of lost, reflected, and transmitted light. Combining Eq. 7.15a, 7.15b for Iτ = ICτ gives:

(7.16)

where χ and τ1 and τ2 are the attenuation factor of the internal resonator and the transmittances of mirrors 1 and 2. When a piezoelectric drive of the motion controller sweeps the resonator’s path length approaching the cavity resonance, the signal transmitted via mirror 2, detected by detector D2, experiences a peak P, and therefore the reflected signal detected by detector D1 sees a dip D:

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