Marketplace for Industrial Lasers最新文献

{"title":"Output of squeezed state light from lasers via phase-conjugation effects in resonators","authors":"Shangqing Liu","doi":"10.1117/12.2294787","DOIUrl":"https://doi.org/10.1117/12.2294787","url":null,"abstract":"Recently much interest has been paid to squeezed states of light. Such states have important potential applications. Obviously, it is convenient for application if squeezed state light can be radiated from lasers directly. This letter proposes a regime for this kind of lasers.","PeriodicalId":322470,"journal":{"name":"Marketplace for Industrial Lasers","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133612305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A design of photo-electric analogue-digital computer","authors":"S. Ling","doi":"10.1117/12.2294855","DOIUrl":"https://doi.org/10.1117/12.2294855","url":null,"abstract":"Original of the Subject,the Comparison of Analogue and Digit Computers Obviously, analogue computer and digital computer have certainly a series of respe- ctive features, because of their different methods to reappear or describe the physical rules as two kinds of calculating tools, so there are many differences between them.","PeriodicalId":322470,"journal":{"name":"Marketplace for Industrial Lasers","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131808643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laser-induced direct deposition of thin films: film transfer","authors":"Binglin Zhang","doi":"10.1117/12.2294779","DOIUrl":"https://doi.org/10.1117/12.2294779","url":null,"abstract":"The process of the laser-induced direct deposition is that the original film on the back side of an optically transparent substrate is directly transferred to a target substrate locatted behind the film by focused pulsed laser radiation[ 1] . Only a small region of the original film, which is exposed by focused laser rediatiom, can be transferred to the target substrate using this technique. Obviously, the advantage of the new technique is to fabricate micro spots of thin films. In principle, micrometer spot of thin film can be fabricated by this technique, because laser beam can be focused in micrometer spot. Probably it is a potentially powerful technique for the fabrication of micro and opto-electronics devices.","PeriodicalId":322470,"journal":{"name":"Marketplace for Industrial Lasers","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131868320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of heat radiation characteristics of the probe of a dichromatic high-temperature optical fiber sensor","authors":"Zeying Chi","doi":"10.1117/12.2294820","DOIUrl":"https://doi.org/10.1117/12.2294820","url":null,"abstract":"It was analyzed that the heat radiation characteristics of the probe of a dichromatic high-temperature opti- cal fiber sensor. The probe was made of sputtering Iridium(Ir) thin film on the end of a sapphire fiber forming a blackbody cavity. According to heat radiation characterisitics of a cylindrical cavity and characteristics of radia- tion, absorption and heat-transfer of a single crystal sapphire, the heat exchanges between the cylindrical Ir cavi- ty and sapphire fiber was neglected rationally. A theoretical model of the heat radiation of the probe, which con- sidered respectively radiation of cylindrical Ir cavity and radiation of sapphre fiber, was established. Then the analytical formula of measured object's temperature T was derived by two wavelengths/(21, 20 power ratio Q which was measured with dicromatic optical fiber pyrometer.","PeriodicalId":322470,"journal":{"name":"Marketplace for Industrial Lasers","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132280270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Holographic interferometry in predicting cathodic deposition of metals in aqueous solution","authors":"K. Habib","doi":"10.1117/12.2294744","DOIUrl":"https://doi.org/10.1117/12.2294744","url":null,"abstract":"A mathematical model relating surface and bulk behaviors of metals in aqueous solution has been developed. The model was established based on principles of Holographic interferometry for measuring microsurface deposition, i.e., mass gain, and with those of electrochemistry for measuring the bulk electronic current, i.e., electroplating current. The model can be utilized to predict the electroplating behavior on metals subjected to cathodic reaction in aqueous solution. In other words, the cathodic current density of metals can be predicted as a function of microsurface deposition.","PeriodicalId":322470,"journal":{"name":"Marketplace for Industrial Lasers","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134609467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The regularization analyse method of the distribution function of the heterodyne quantum efficiency of the HgO 8CdO2Te photo-electrical diode","authors":"Yongjiang Dai","doi":"10.1117/12.2294655","DOIUrl":"https://doi.org/10.1117/12.2294655","url":null,"abstract":"A regularization analyse method of the distribution function of the heterodyne quantum efficiency function for the Hg..Cdo 2Te Photo-electrical Diode on photosurface has been introduce. And the distribution function of the heterodyne quantum efficiency n (x,y) has been measured by the coherent laser detection system. The experimental and calculative results for the regularization analyse method has been discussion. (Financed by the NNSEC)","PeriodicalId":322470,"journal":{"name":"Marketplace for Industrial Lasers","volume":"60 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133072249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The line broadening and red shift satellite line phenomena in 1000 GW Nd3+:Phosphate-glass laser system","authors":"Dounan Zhuang","doi":"10.1117/12.2294763","DOIUrl":"https://doi.org/10.1117/12.2294763","url":null,"abstract":"Using a grating spectrograph with a 0. 006nm resolution to monitor the laser spectrum of ai 1000 GM Nd phosphate-glass laser system. When the laser power intensity is up to 1 GW / cm (100 ps pulse), the laser linewidth has a 1. 04nm broadening, and there is a red-shift(3. 77nm away from the main laser line)satellite line appears. The red shift line consists of several peaks, and spectral intensity is nearly 3 / 5 of the main laser line intensity. When laser power intensity is reduced to 0. 37 J/ cm (3 ns pulses), the red shift phenomena disppears, and line width broadening is less too. The red shift phenomena probably comes from the Raman scattering of the phosphate glass and has been amplified in the gain medium.","PeriodicalId":322470,"journal":{"name":"Marketplace for Industrial Lasers","volume":"190 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115054853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grazing incidence grating spectrometer in the low energy x-ray region","authors":"XianXin Zhong","doi":"10.1117/12.2294840","DOIUrl":"https://doi.org/10.1117/12.2294840","url":null,"abstract":"A new soft X-ray grating spectrometer for studying laser produced plasmas has been developed. The 1 m grating incidence vaccum spectrometer is equipped with a 1200 grooves / mm or 600 grooves / mm grating and a 1000 A thick aluminum filter. The spectrometer is arranged at a vaccum target chamber when it is used to measure the ionic distribution. It is aligned accurately in target plane using 4 D. adjustment unit and a system with optical fiber bundle, electronic camera and TV monitor. The design of optical system, novel construction of spectrometer, and experiment arrangement and results are discussed.","PeriodicalId":322470,"journal":{"name":"Marketplace for Industrial Lasers","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117136032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Linearity analysis of fiber-optic gyroscope","authors":"Chang-He Shang","doi":"10.1117/12.2294818","DOIUrl":"https://doi.org/10.1117/12.2294818","url":null,"abstract":"Fundamental principles of closed-loop fiber-optic gyroscopes are described. Based on the closed-loop condition, simulated by computer, the linearity of scale factor is analyzed. The result shows, for a given gated time, it is possible to find the best amplitude ratio between the first and the second harmonics of feedback signal so that the optimum linearity of scale factor for fiber-optic gyroscope can be achieved. The scale factor of practical fiber-optic gyroscope should have good linearity in a wide dynamic range. Two techniques are used for this purpose, electrical signal processing and phase nulling. Limited dynamic range of fiber-optic gyroscopes is caused by the nonlinear relation between output signal amplitude and phase difference in the interferometer. The fundamental principle of electrical signal processing is to recover the original phase information in sensing loop. Pseudoheterdyne detection technique is to transfer Sagnac phase shift caused by gyroscope rotation into a phase of low frequency signal, so the dynamic range is extended. Phase nulling is to induce artificially a compensating phase whose amplitude is equal to Sagnac phase shift, but in opposite direction. As such, the gyroscope is operated at zero phase shift and gyroscope dynamic range is limited only by the feedback control component. Gated phase modulation approach can realize closed-loop operation of the gyroscope. The key component to this technique is a phase modulator giving two functions of biasing and nulling. For normal cylindrical piezoelectric phase modulator, it is difficult to have flat frequency response. To improve linearity of scale factor, one must control relative amplitudes and phases of different harmonics of nulling signal. The necessary nulling signal in closed-loop operation of fiber-optic gyroscope can be simulated by a microcomputer. Simulated result shows that the scale factor of fiber- optic gyroscope depends on the ratio of the fundamental and the second harmonics and the duty cycle of gating signal. For a given gating time a reasonable amplitude ratio for optimum linearity of scale factor of gyroscope can be found. The schematic diagram of fiber-optic gyroscope is shown in fig 1, where fb is the bias modulation frequency. Output signal of a pulse generator is applied to a low-pass filter and relative phase of different harmonics is adjusted to get a composite signal shown in fig 2, including the fundamental and the second harmonics. This signal used to give a compensating phase is added to the modulator to realize closed-loop operation. The output signal of the fiber-optic gyroscope is applied to PSD via a preamplifier and a bandpass filter. The error signal from PSD, whose output includes the information of rotation rate and direction is used to control the amplitude and the polarity of nulling signal. PSD output signal is represented as:","PeriodicalId":322470,"journal":{"name":"Marketplace for Industrial Lasers","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115801688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GaAs/GaAlAs travelling-wave type laser amplifier with tilted facets","authors":"F. Xu","doi":"10.1117/12.2294784","DOIUrl":"https://doi.org/10.1117/12.2294784","url":null,"abstract":"GaAs/ GaAlAs travelling-wave type laser amplifiers with different tilted angle facets are defined by proton-bombardment. Some characters are measured. Maximum single-pass gain of 27. 8 dB are attained with optical fiber coupling system.","PeriodicalId":322470,"journal":{"name":"Marketplace for Industrial Lasers","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123446523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}