Electro-optic modulator, EOM

Fig. 1 Setup for transient holographic grating measurements. The electro-optic modulators (EOMs) are used for 180°-phase shifts of the holographic grating. The piezo mirror serves for phase matching between the diffracted beam and the coherent reference wave generated by the local oscillator. The setup is a modified version of the one described in [87]...

The first successful ROA measurements were achieved with the use of an electro-optic modulator (EOM) operating in a square-wave modulation cycle. 

Fig. 1. Set-up of the PTB laser system. The Nd YAG laser is frequency stabilized onto a selected iodine absorption line using the phase modulation method. The probe beam is modulated at 2.05 MHz by an electro-optic modulator (EOM), the pumb beam is frequency shifted by an acousto-optical modulator (AOM). The driving AOM rf power is chopped in order to cancel frequency offsets introduced by the Doppler background using a lock-in detection scheme. The transmitted probe beam signal is detected by a photodiode (PD) and mixed with the EOM rf in a double balanced mixer (DBM)...

Fig. 9.13 Cooling, deflection and compression of atoms by photon recoil. The electro-optic modulators (EOM) and the acousto-optic modulator (AOM) serve for sideband generation and frequency tuning of the cooling laser sideband [1136]...

Fig. 2. Schematic diagram of the laser system to be used for a measurement of the 2Si/2-2P3/2 transition frequency in Si13+. (A/2 half wave plate, A/4 quarter wave plate, PBS polarizing beamsplitter, VCO voltage-controlled oscillator, AOM acoustooptic modulator, EOM electro-optic modulator)...

Fig. 4 (a) The D1 transitions coupled by a fiequency modulated coupling field and two probe fields (one as the signal Qs and another as the control Qc) behaves as the coherently coupled three-level A-type system. The spontaneous decay rate of the excited state 3> is 73 (=271x5.4x10 s for the 5Pi/2 F =3 state), (b) Simplified diagram of the experimental set up. AOM acousto-optic modulator EOM electro-optic modulator, PMF polarization maintaining fiber X/4 quarter-wave plate DL extended-cavity diode laser, M mirror, D photodetector. 

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