In this paper, spectral hole depth dependence on temperature below 10 K in Tm^3＋ ：YAG crystal is investigated in detail. A novel model is proposed to analyze the temperature dependence on the spectral hole. By using...In this paper, spectral hole depth dependence on temperature below 10 K in Tm^3＋ ：YAG crystal is investigated in detail. A novel model is proposed to analyze the temperature dependence on the spectral hole. By using the proposed model, we theoretically deduce the temperature dependence of spectral hole depth. The results are compared with experimental results and they are in good agreement. According to the theoretic results, the optimum temperature in experiment can be found.展开更多
In this paper, the physical mechanism of the interaction between electromagnetic wave and spectral-hole burning crystal material is investigated in detail. In the small signal regime, a perturbation theory model is us...In this paper, the physical mechanism of the interaction between electromagnetic wave and spectral-hole burning crystal material is investigated in detail. In the small signal regime, a perturbation theory model is used to analyze the mechanism of spectral-hole burning. By solving the Liouville equation, three-order perturbation results are obtained. From the theoretic analysis, spectral-hole burning can be interpreted as a photon echo of the zero-order diffraction echo when the first optical pulse and the second optical pulse are overlapped in time. According to the model, the spectral-hole width is dependent on the chirp rate of the reading laser. When the chirp rate is slow with respect to the spectral features of interest, the spectral hole is closely mapped into time domain. For a fast chirp rate, distortions are observed. The results follow Maxwell-Bloch model and they are also in good agreement with the experimental results.展开更多
A method of measuring laser frequency stability is proposed by using the spectral-hole-burning technique.The power spectra of the measured laser can be recorded as a spectral hole,and the engraving time of the spectra...A method of measuring laser frequency stability is proposed by using the spectral-hole-burning technique.The power spectra of the measured laser can be recorded as a spectral hole,and the engraving time of the spectral hole is mapped into the frequency of the measured laser.Frequency fluctuation can be expressed by spectral hole frequency variation with different engraving times.By using the proposed method,the frequency stability of the external-cavity diode laser is measured to be 2.22×10^(-9) with an integration time of 20 ms.The frequency stability measurement resolution reaches 14 kHz and the repetition rate is 50 Hz.Compared to the conventional method,it avoids the need for a high stability reference laser source.展开更多
基金supported by the National Natural Science Foundation of China (Grant No. 11004152)the Science Fund of Tianjin Education Commission (Grant Nos. 20090715 and 20110704)
文摘In this paper, spectral hole depth dependence on temperature below 10 K in Tm^3＋ ：YAG crystal is investigated in detail. A novel model is proposed to analyze the temperature dependence on the spectral hole. By using the proposed model, we theoretically deduce the temperature dependence of spectral hole depth. The results are compared with experimental results and they are in good agreement. According to the theoretic results, the optimum temperature in experiment can be found.
基金supported by the Special Funds for Scientific and Technological Innovation Projects,Tianjin,China(Grant No.10FDZDGX00400)
文摘In this paper, the physical mechanism of the interaction between electromagnetic wave and spectral-hole burning crystal material is investigated in detail. In the small signal regime, a perturbation theory model is used to analyze the mechanism of spectral-hole burning. By solving the Liouville equation, three-order perturbation results are obtained. From the theoretic analysis, spectral-hole burning can be interpreted as a photon echo of the zero-order diffraction echo when the first optical pulse and the second optical pulse are overlapped in time. According to the model, the spectral-hole width is dependent on the chirp rate of the reading laser. When the chirp rate is slow with respect to the spectral features of interest, the spectral hole is closely mapped into time domain. For a fast chirp rate, distortions are observed. The results follow Maxwell-Bloch model and they are also in good agreement with the experimental results.
基金Supported by the National High-Tech Research and Development Program,the National Natural Science Foundation of China under Grant No 11004152the Funds of Tianjin Education Commission under Grant Nos 20090715,20110704。
文摘A method of measuring laser frequency stability is proposed by using the spectral-hole-burning technique.The power spectra of the measured laser can be recorded as a spectral hole,and the engraving time of the spectral hole is mapped into the frequency of the measured laser.Frequency fluctuation can be expressed by spectral hole frequency variation with different engraving times.By using the proposed method,the frequency stability of the external-cavity diode laser is measured to be 2.22×10^(-9) with an integration time of 20 ms.The frequency stability measurement resolution reaches 14 kHz and the repetition rate is 50 Hz.Compared to the conventional method,it avoids the need for a high stability reference laser source.
