基于外差干涉的微振动测量技术研究

针对外差干涉的微振动测量存在稳定性低、严重受环境噪声影响等缺点,提出了对光路的改进方案。根据差分原理将其改为双光路,消除环境噪声的干扰;通过偏振分光棱镜（PBS）将椭圆偏振光变为线偏光,提高干涉信号幅值;改进频移装置(AOM),抑制频率漂移;增加光阑,滤除杂散光,提高系统信噪比。通过探测5 kHz压电陶瓷振动信号,以及2.5 MHz高频激光超声信号进行实验验证,结果表明:信号稳定且无纹波,系统分辨率为2.3 nm,信噪比提高16.7倍。两路干涉信号幅值分别为552 mV和736 mV,较传统外差干涉信号幅值提高近10倍,有利于纳米量级微振动信号的检测。     

Studies of spectral and coloristic properties of ultradispersive hematite particles

B. I. Stepanov Institute of Physics, Academy of Sciences of Belarus, 70 F. Skorina Ave., Minsk, 220072, Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 62, No. 6, pp. 157–165, November–December, 1995.     

干涉条纹移动的偏振法

本文根据二个椭圆偏振光场进行的理论分析,着重讨论了两个相互正交的圆偏振光(左旋和右旋〕场和一个椭圆偏振光与线偏振光场的特点,以此为基础讨论了干涉条纹移动的偏振法。     

一种简单的干涉光路

介绍了用反射镜和立方棱镜实现两束光相干涉的光路。     

Optical properties of pure and doped Y3Fe5O12 single crystals

Institute of Physics of Solids and Semiconductors, Academy of Sciences of Belarus, 17, P. Brovka Str., GSP, Minsk, 220072. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 63, No. 4, pp. 667–675, July–August, 1996.     

Spectral luminescent properties of monomeric and associated molecular forms of acridine dyes in polymer matrices

M. V. Lomonosov Moscow State University, Leninskie Gory, 119899, Moscow, Russia. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 62, No. 2, pp. 38–46, March–April, 1995.     

Depolarization loss of interference-pattern contrast when probing radially loaded cylindrical glass laser matrices

Results of an investigation of the depolarization loss of interference-field contrast are presented. The loss of contrast was found experimentally and simulated numerically for different interferometric schemes: with lateral and radial shifts and with a reference beam. It is found that the original polarization of the probing radiation affects substantially the integral contrast of the interference field. Baltic State Technical University, 1, 1st Krasnoarmeiskaya St., St.-Petersburg, 198005, Russia. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 1, pp. 62–66, January–February, 1998.     

Dispersion of light and EDGE absorption of thin Y2O3 films

We measured the dispersion of light in thin Y₂O₃ films in the visible and near UV regions of the spectrum. The spectrum of edge absorption is investigated. We found the parameters of a single-oscillator approximation and determined the dispersion energy and the ionicity of bonding. I. Franko L’vov State University, 50, Dragomanov St., L’vov, 290005, Ukraine. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 5, pp. 651–654, September–October, 1997.     

Effect of sweeping the “instantaneous” lasing frequency on the amplitude-detuning characteristic of a CO2 laser with loss modulation

The influence of changes in the refractive indices of the active medium and the loss modulator on the amplitude-detuning characteristic of a CO₂ laser was theoretically investigated. It is shown that at a comparatively great magnitude of sweeping the “instantaneous” lasing frequency, the magnitude of the laser response increases not only in negative detunings, but also over a wide range of positive detunings. The use of the procedure of changing the magnitude and sign of detuning as well as the range of sweeping and the frequency of modulation makes it possible to realize various periodic and chaotic regimes of lasing, i.e., to exercise control over the time and energy parameters of pulses over a very wide range. B. I. Stepanov Institute of Physics of the Academy of Sciences of Belarus, 70, F. Skorina Ave., Minsk, 220072, Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 3, pp. 318–324, May–June, 1997.     

Spectral study on the molecular orientation of a tetracationic porphyrin dye on the surface of layered silicates

Tetracationic porphyrin dyes TMPyP and ZnPyP were intercalated into hydrophobized layered silicate films of three smectites. The smectites represented the layered silicate specimens of high (Fluorohectorite, Corning; FHT), medium (Kunipia F montmorillonite; KF) and low layer charge (Laponite, Laporte; LAP). The molecular orientations of the dye cations were studied by means of linearly-polarized ultraviolet-visible (UV-VIS) spectroscopy. The spectral analysis and consequent calculations of tilting angles of the transition moments at the wavelengths of Soret band transitions were in the range of 25°-35°. The determined angles indicated molecular orientation of the dye cations being almost parallel to the surface of the silicates. Slightly higher values (above 35°), determined for a FHT film, indicated either a slightly tilted orientation of the dye cations or the change of molecular comformation after the intercalation of the dye. Presented at 5-th International Conference Solid State Surfaces and Interfaces, November 19–24, 2006, Smolenice Castle, Slovakia     

偏振干涉成像光谱仪中格兰-泰勒棱镜全视场角透过率的分析与计算

论述了自行设计研制的偏振干涉成像光谱仪的工作原理,分析了其核心部件格兰-泰勒棱镜的分光机理;运用光线追迹方法,推导出了格兰-泰勒棱镜全视场角透过率计算公式;通过计算机模拟分析了入射面、入射角和空气隙厚度对该棱镜透过率的影响,并利用方解石Sellmeier色散方程,给出了该棱镜在仪器系统要求的光谱范围内透过率与波长的关系曲线;实验测试结果与理论计算公式相符,验证了理论公式的正确性.     

Spectral methods for estimating the state of winter RYE sowings

We present the results of comprehensive investigations that include remote spectral measurements under field conditions, laboratory experiments, and mathematical simulation of the radiative regime of winter rye sowings. B. I. Stepanov Institute of Physics, Academy of Sciences of Belarus, 68, F. Skorina Ave., Minsk, 220072, Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 5, pp. 646–650, September–October, 1997.