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1.
A saturated absorption technique using an actively stabilized C.W. dye laser has been used to study the hyperfine structure of some lines lying in the 9-3, 10-3, 11-3, 11-4, 12-3 bands of the B-X system of molecular iodine. The comparison of the different spectra shows that the intensities of the different hyperfine components of one line deviate from the 2F + 1 proportionality when 'v decreases towards the value 'v=6 where the potential curves of the 3Π+0 and 1u states are crossing. The preliminary experimental results concerning the hyperfine component intensity variations versus the quantum numbers 'v, J and F give a direct qualitative support to the recently reported hyperfine predissociation in I2. 相似文献
2.
The principles, techniques and apparatus of two demonstration experiments using a tunable cw-laser are described. In the first
experiment a passive external cavity enhanced the intensity of an incident laser beam enough to generate easily detected second
harmonic UV radiation. The experiment also showed how to lock the frequency of one cavity to that of another. The second experiment
used laser saturation spectroscopy to obtain sub-Doppler resolution and thereby exhibit the hyperfine spectrum of iodine molecules. 相似文献
3.
B. Couillaud A. Ducasse A. Dienes 《Applied Physics A: Materials Science & Processing》1980,23(2):135-140
A laser system capable of generating picosecond pulses of 2 ps duration and peak powers of up to 50 MW, tunable throughout
the emission spectrum of the lasing medium is described. The system consists of a cw dye laser which is tuned and is actively
mode-locked by means of a novel interferometer. Single-pulse amplification is achieved via a two-stage N2-laser-pumped amplifier arrangement. One of the most attractive features of the system here described is its inherent versatile
broad tunability, which should allow, with different lasing media and pump sources, ps pulse generation from 400 to 700 nm
using the same interferometer device. 相似文献
4.
B. Pouligny J.R. Lalanne B. Couillaud A. Ducasse L. Sarger 《Optics Communications》1981,37(4):271-276
We report on a first application of picosecond spectroscopy in the field of microemulsions. First results are given about the reorientation and absorption recovery kinetics of DODCI localized in the core of inverted micelles containing methanol. The experimental technique is the Absorption Saturation. The isotropic and anisotropic parts of the saturated absorption are detected with a time resolution of a few picoseconds. 相似文献
5.
The hyperfine structure of some new iodine lines has been observed over the tuning range of Rhodamine 6G (5800–6200 Å), using a free running, single mode cw dye laser. The resolution obtained in this experiment allowed to calculate the hyperfine constants of the excited state (3π0+) of iodine with an accuracy of 2% for the quadrupole coupling constant and 50% for the magnetic one. 相似文献
6.
T. Srinivasan H. Egger K. Boyer H. Pummer C. K. Rhodes T. S. Luk D. F. Muller M. Rothschild J. Bokor R. R. Freeman W. E. Cooke H. Schomburg H. F. Döbele B. Rückle L. A. Bloomfield B. Couillaud Ph. Dabkiewicz H. Gerhardt T. W. Hansch R. Hilblg R. Wallenstein R. M. Jopson C. B. Collins F. W. Lee D. M. Shemwell B. D. DePaola S. Olariu I. Iovitzu Popescu R. W. Waynant M. D. Levenson K. Jain C. G. Willson B. J. Lin 《Applied physics. B, Lasers and optics》1982,28(2-3):198-207
7.
R. Behn M. A. Dupertuis I. Kjelberg P. D. Morgan T. Okada M. R. Siegrist B. Couillaud A. Ducasse E. Freysz L. Sarger Lu Yia Xiong E. Fischer Z. N. Rozkwitalski F. K. Kneubühl J. S. Helman C. Rau C. F. Bunge A. K. Kar R. G. Harrison C. A. Emshary D. M. Tratt S. D. Smith G. Marowsky E. Albers K. Hohla W. T. Silfvast O. R. Wood II J. J. Macklin K. -H. Stephan-Rossbach F. J. Comes F. K. Tittel R. Sauerbrey W. Walter W. L. Wilson Jr. 《Applied physics. B, Lasers and optics》1982,29(3):143-148
Conclusion We have demonstrated the existence of an anomalous polarization coupling mechanism present in the injection locked TEA CO2 laser. As a direct consequence of this work, a new injection technique has been formulated which permits efficient injection coupling and maximises energy extraction whilst eliminating the detrimental optical feedback effects to which other injection locking systems are prone.Supported by the Office of Naval Research and the National Science Foundation 相似文献
8.
B. Couillaud A. Ducasse A. Dienes 《Applied Physics A: Materials Science & Processing》1978,16(4):359-365
An analysis of the useful signals detected in saturated absorption spectroscopy experiments is given. Both Gaussian and plane-wave
fields are considered. The various cases of unmodulated, square-wave modulated and sinusoidally modulated saturating beams
are examined. It is found that square-wave and sinusoidal modulations give different results. The first is identical to no
modulation, and detection at the fundamental frequency records a fraction of the total signal which is also a square wave.
The second gives fundamental or higher-harmonic signals each with a very different dependence on the saturation parameter.
The signal at the fundamental saturates faster and more completely than that for square-wave modulation. The results suggest
experimental methods for the determination of the absolute value of the saturation parameter. 相似文献
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