Compact acousto-optic modulator operating in the purely Raman-Nath diffraction regime as a phase modulator in FM spectroscopy

被引：14

作者：

Baryshev, V. N. ^{[1
]}

Epikhin, V. M. ^{[1
]}

机构：

[1] Stat Sci Ctr, All Russia Res Inst Physicotech & Radio Measurmen, Mendeleyevsk 141570, Moscow Region, Russia

来源：

QUANTUM ELECTRONICS | 2010年 / 40卷 / 05期

关键词：

diode laser; FM sideband heterodyne spectroscopy; acousto-optic modulator; Raman-Nath diffraction; coherent population trapping (CPT) resonances; RESONANCES; LASER;

D O I：

10.1070/QE2010v040n05ABEH014074

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report fabrication of a new acousto-optic modulator (AOM-RN) operating purely in the Raman Nath diffraction regime. This device can be used as an external phase modulator in frequency-modulation (FM) optical heterodyne spectroscopy for fast and broadband frequency control of diode lasers. The AOM-RN design is significantly simplified, and its dimensions are minimised due to a decrease (by almost an order of magnitude in comparison with the existing AOMs) in the acousto-optic interaction length and the absence of impedance matching circuit. The FM spectroscopy based on AOM-RN makes it possible to analyse both absorption and dispersion properties of optical resonances under study; this possibility is shown by the example of saturated-absorption resonances in cesium vapour. The possibility of detecting coherent population trapping resonances using FM spectroscopy with AOM-RN as an external phase modulator is experimentally demonstrated.

引用

页码：431 / 436

页数：6