An accuracy of 2×10-5±1 Hz in the measurement of beat frequency arisen from a magnetic field and a laser frequency stability of 5×10-9 for an averaging time of 1 sec were obtained.

In three experiments,frequencies of the Gunn oscillator are 93.16,73.54 and 73.9 GHz while corresponding harmonic orders are 15th,19th and 22nd respectively laser frequencies are 1.397(former two)and 1.626 THz(last one)respectively.

We have recorded the differential spectrum of saturated absorption lines of SF6 and locked CO2 laser frequencies in the centers of several absorption lines of SF6.

By solving the laser-DNA interaction equation and calculating the correlation dimension,it was concluded that the DNA molecules system can be excited into the chaos state, by laser. The influence of different laser frequencies on the DNA system chaos was discussed and the genetic variation phenomenon caused by laser in a large frequency range was explained.

With optical feedback and the control of MCU scanning procedure in the transmitter,the frequency of laser is locked within the VADOFs transmission peak. And narrow band with atomic optical filter is used in the receiver.

The method can stabilize the output frequency of laser on the peak of atoms absorption lines and less lose lock. The laser stabilized by this method is used in the experiment of laser cooling atoms.

The mean volume fraction of benzene and toluene is 0.107×10~(-6) and 0.130×10~(-6) in sediment respectively, 0.844×10~(-6), 0.195×10~(-6) in slurry gas respectively and δ~(13)C_1 is -21‰～-72‰.

We find that with the parameters of σ = ω_p(ω_1-ω_2) and β=ω_2/ω_1 properly chosen (where ω_p, ω_1, ω_2 are the plasma frequency and frequencies of the two laser beams respectively), the required large-amplitude plasma wave will be excited even though the incident laser beams are relatively weak. As a result, the injected electrons will get a sighificant energy gain.

One finds appearance of the laser freqyency and the plasmon of Na 2 in laser pulse(intensity 1.338×10 12 W/cm 2, frequency 5.266 eV) since the corresponding ponderomotive potential is low.

An increase in the reflectance at the laser frequency used was observed, which was named "hole burning" in the IR reflection spectra of specimens.

At the incident laser frequency, a narrow, 5-cm-1wide hole is also burnt in the IR spectra of the irradiated samples.

The spectral properties of the quadrature components of the laser frequency and its subharmonic and the photon statistics have been studied as dependent on the pump power, crystal length, and reflectance of the laser cavity output mirror.

A decrease in the spectral density of fluctuations of the laser frequency quadrature does not exceed 10%.

A new principle of the diode laser frequency tuning has been developed and implemented.

Spectral characteristics of rubidium atoms confined in a dark magneto-optical trap (DMOT) are measured, including probe absorption spectra and atom density as a function of the cooling and repumping laser frequencies.

The spectrum consists of two distinct quintets centered about the coupling and probe-laser frequencies.

As a consequence, variation of the laser frequencies leads to hysteresis effects.

Dependence of EIT on laser frequencies and intensities, on the magnetic field strength as well as on the temperature of the sodium vapour is studied.

Sodium MOT collection efficiency as a function of the trapping and repumping laser frequencies and intensities

Effect of the Frequency of Laser Radiation on the IR Multiphoton Dissociation of Diethylsilane

Effect of perturbations in an active medium on the instability of the difference frequency of laser radiation

It is shown that if the frequency of laser radiation is equal to the cyclotron frequency, the magnetoabsorption line shape can be fully determined by the IR radiation intensity.

The results of the studies on the transformation of the frequency of laser radiation in polyimide films doped by C70 are presented.

Dynamics of resonant fluorescence from atomic Cs vapor at scanning the frequency of laser radiation in the presence of a constan

This paper describes an automatic step and repeat reduction camera with precision positioning by applying the theory of light interference, using a He-Ne gas laser for light source. The camera consists of a laser interferometer system, a set of precision mechanism, a numerical control device and a laser frequency stabilizer. The displacement of the working table is measured and located by the laser interferomenter system, so the accuracy of the camera in repeat positioning is better than micron. In this paper,...

This paper describes an automatic step and repeat reduction camera with precision positioning by applying the theory of light interference, using a He-Ne gas laser for light source. The camera consists of a laser interferometer system, a set of precision mechanism, a numerical control device and a laser frequency stabilizer. The displacement of the working table is measured and located by the laser interferomenter system, so the accuracy of the camera in repeat positioning is better than micron. In this paper, the properties in the design of the laser interferometer system and the problems concerned with application of laser to precision positioning of the working table in the camera are given with some emphasis. At the sametime, it affords major technical parameters and experimental data. At the end of this paper, the analysis of accuracy and the result of calibration of the cameras show that actual accuracy of the cameras is up to about e0.75 micron. Cameras of this type are now used in industrial practice.

The principle of the design of our dilatometer for the determination of low expansioncoefficients lies in the equithickness interference of light, using He-Ne laser as lightsource. The dilatometer has an absolute sensitivity of 0.03 micron and a relative error of 0.3x10~(-6) in respect to samples having a length of 10 cm. The furnace temperature can be contro-lled within ±0.5℃. The instrument has been proven to be feasible in the study of materialswith low coefficients of expansion. The paper dealt with special...

The principle of the design of our dilatometer for the determination of low expansioncoefficients lies in the equithickness interference of light, using He-Ne laser as lightsource. The dilatometer has an absolute sensitivity of 0.03 micron and a relative error of 0.3x10~(-6) in respect to samples having a length of 10 cm. The furnace temperature can be contro-lled within ±0.5℃. The instrument has been proven to be feasible in the study of materialswith low coefficients of expansion. The paper dealt with special details in respect to theeffects of the frequency stability of the laser, the vacuity of the furnace, and the tempe-rature gradient of the effective temperature field upon the precision of the determinations.

It is shown that a laser by using the relativistic Doppler effects of high energy ion beam in negative temperature state will be continuously turnable from infrared to X-ray region. The turnability range is △vT = 2v0βy. The relativistic fransform of the laser parameters are given, and the gain, threshold" and output parameters of the relativistic ion beam laser are calculated in the present work. The methods to excite ion beam by means of laser are analysed. The design of He+ and Ar+ ion beam lasers are also...

It is shown that a laser by using the relativistic Doppler effects of high energy ion beam in negative temperature state will be continuously turnable from infrared to X-ray region. The turnability range is △vT = 2v0βy. The relativistic fransform of the laser parameters are given, and the gain, threshold" and output parameters of the relativistic ion beam laser are calculated in the present work. The methods to excite ion beam by means of laser are analysed. The design of He+ and Ar+ ion beam lasers are also discussed.