Download or read book Long Term Laser Frequency Stabilization written by Shaoul Ezekiel and published by . This book was released on 1977 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes research progress on long-term laser frequency stabilization for the period January 1, 1976 - December 31, 1976. It includes a list of publications published under AFOSR support. (Author).
Download or read book Long Term Laser Frequency Stabilization Using a Molecular Beam written by Shaoul Ezekiel and published by . This book was released on 1978 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the research program was the long-term stabilization of the frequency of the 5145 A argon ion laser by using an I2 resonance, observed in a molecular beam, as a reference. The major accomplishments and the status of the program are outlined below. The 5145 A argon ion laser has been locked to a hyperfine transition in a molecular beam of I2. Two methods were used to measure the long-term frequency drift. The first method is the simpler one, and only requires one additional molecular beam apparatus. Here, the laser frequency drift is monitored by measuring the shift of the laser frequency with respect to the center of the same I2 transition observed in an independent molecular beam. In the second and more conventional method, two argon lasers are independently stabilized to adjacent I2 transitions in independent molecular beams. The two laser outputs are mixed on a fast photodiode, and the resulting beat frequency gives an accurate measure of frequency stability. Both methods yielded similar results; i.e., better than one-part-in 10 to the 13th power in an integration time of about 100 seconds. This was the highest stability achieved in the visible region of the spectrum at the time the measurements were made. The shift in the stabilized laser frequency as a function of laser intensity was found to be less than two-parts-in 10 to the 14th power for a 1% change in laser intensity at I mW. This value is still an upper limit at present, pending a more detailed study.
Download or read book A Molecular Beam Primary Reference for Long term Laser Frequency Stabilization written by Shaoul Ezekiel and published by . This book was released on 1968 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Frequency Stabilization Standards Measurement and Applications written by John L. Hall and published by SPIE-International Society for Optical Engineering. This book was released on 2001 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Frequency Stabilization for Trapped Yb Experiments written by Deon Anton Janse van Rensburg and published by . This book was released on 2020 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project sets out to frequency stabilize external cavity diode lasers of wavelengths = 935 nm and 739 nm, with an eye to Ytterbium-171 ion trapping. The desired laser linewidths were below 1 MHz at 1 second observation time and the desired long term frequency drifts were below a megahertz over the course of a few hours. To stabilize the lasers, two Pound-Drever-Hall laser frequency stabilisation systems were designed, constructed and characterized. The optical frequency references used were sub-megahertz linewidth optical cavities with Invar spacers. These cavities were designed and constructed inhouse. The achieved long term stability of the stabilized lasers was 1 MHz/h over a 5 hour measurement period. The laser frequency long term stabilities are limited by the thermal stabilities of the cavity spacers. The post stabilisation laser frequency noise was lowered when compared to the free running lasers. This was observed by determining the laser frequency noise power spectral densities. From the frequency noise power spectral densities lower bounds on the locked laser linewidths were established. This lower bound is 11.92 kHz for the 739 nm wavelength laser at 1 second observation time and 5.4 kHz for the 935 nm wavelength laser. An additional system was designed and constructed to stabilize the 935 nm wavelength laser to an in-house built piezo electrically tunable cavity noise power spectral densities to simultaneously stabilize the length of the cavity to a microwave frequency referenced to a Rubidium frequency standard. Technical limitations (optical feedback into the the 935 nm wavelength laser cavity) prohibited the implementation of a stable lock of the cavity length.
Download or read book The Development of a Short term Laser Frequency Stabilization System for High Resolution Spectroscopy written by Arturo Chavez-Pirson and published by . This book was released on 1983 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improvement of Laser Frequency Stabilization for the Optical Pumping Cesium Beam Standard Supported by the National Fundamental Research Program of China Under Grant No 2011CB921501 and the National Natural Science Foundation of China Under Grant Nos 91336103 10934010 and 61078026 written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : A method is presented to improve the laser frequency stabilization for the optical pumping cesium clock. By comparing the laser frequency stabilization of different schemes, we verify that the light angle is an important factor that limits the long-term frequency stability. We minimize the drift of the light angle by using a fiber-coupled output, and lock the frequency of a distributed-feedback diode laser to the fluorescence spectrum of the atomic beam. The measured frequency stability is about 3.5 × 10 −11 at 1 s and reaches 1.5 × 10 −12 at 2000 s. The Allan variance keeps going down for up to thousands of seconds, indicating that the medium- and long-term stability of the laser frequency is significantly improved and perfectly fulfills the requirement for the optical pumping cesium clock.
Download or read book Laser Frequency Stabilization and Noise Reduction written by Yaakov Shevy and published by SPIE-International Society for Optical Engineering. This book was released on 1995 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Laser Frequency Stabilization written by Martin Marietta Corporation and published by . This book was released on 1969 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CO 2 Laser Frequency Stabilization written by D. C. Dumitras and published by . This book was released on 1985 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Frequency Stabilization with Pound Drever Hall Technique written by Yin Feng and published by . This book was released on 2015 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser frequency stabilization is important in laser science and various researches requiring laser beams with high frequency precision. However, the changes in physical parameters of the lasers themselves and in the external environments often cause instability in the output frequency of the laser. This thesis studied the frequency locking system for a continuous-wave diode laser. Using the Pound-Drever-Hall technique, the system can significantly reduce the linewidth of an input laser with an un-stabilized linewidth. It uses a high-finesse Fabry-Perot cavity, which is mechanically and thermally isolated, as a frequency reference to measure the time-varying frequency of the input laser. An electronic feedback loop works to correct the frequency error and maintain constant optical power.
Download or read book Frequency Stabilization of Diode Laser Pumped Solid State Lasers written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-07 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the NASA Sunlite program is to fly two diode-laser-pumped solid-state lasers on the space shuttle and while doing so to perform a measurement of their frequency stability and temporal coherence. These measurements will be made by combining the outputs of the two lasers on an optical radiation detector and spectrally analyzing the beat note. Diode-laser-pumped solid-state lasers have several characteristics that will make them useful in space borne experiments. First, this laser has high electrical efficiency. Second, it is of a technology that enables scaling to higher powers in the future. Third, the laser can be made extremely reliable, which is crucial for many space based applications. Fourth, they are frequency and amplitude stable and have high temporal coherence. Diode-laser-pumped solid-state lasers are inherently efficient. Recent results have shown 59 percent slope efficiency for a diode-laser-pumped solid-state laser. As for reliability, the laser proposed should be capable of continuous operation. This is possible because the diode lasers can be remote from the solid state gain medium by coupling through optical fibers. Diode lasers are constructed with optical detectors for monitoring their output power built into their mounting case. A computer can actively monitor the output of each diode laser. If it sees any variation in the output power that might indicate a problem, the computer can turn off that diode laser and turn on a backup diode laser. As for stability requirements, it is now generally believed that any laser can be stabilized if the laser has a frequency actuator capable of tuning the laser frequency as far as it is likely to drift in a measurement time. Byer, Robert L. Unspecified Center...
Download or read book The Quantum Physics of Atomic Frequency Standards written by Jacques Vanier and published by CRC Press. This book was released on 2015-08-05 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume covers advances in atomic frequency standards (atomic clocks) from the last several decades. It explains the use of techniques, such as laser optical pumping, coherent population trapping, laser cooling, and electromagnetic and optical trapping, in the implementation of classical microwave and optical atomic frequency standards. The authors describe the basic physics behind the operation of atomic clocks, explore new frequency standards that provide better stability and accuracy than conventional standards, and illustrate the application of atomic clocks in various areas.
Download or read book Precision Spectroscopy Diode Lasers and Optical Frequency Measur written by Leo Hollberg and published by DIANE Publishing. This book was released on 2000 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selected set of reprints from the Optical Frequency Measurement Group of the Time and Frequency Div. of the Nat. Inst. of Standards and Technology and consists of work published between 1987 and 1997. The 2 programs represented are (1) development of tunable diode-laser technology for scientific applications and precision measurements, and (2) research toward the goal of realizing optical-frequency measurements and synthesis. The papers are organized in 5 categories: diode laser technology; tunable laser systems; laser spectroscopy; optical synthesis and extended wavelength coverage; and multi-photon interactions and optical coherence.
Download or read book Frequency Stabilization of a Waveguide Laser Using Pound Drever Hall written by and published by . This book was released on 2006 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The generation of ultra-stable model-locked pulses in the 1550 regime is required for high resolution signal processing applications that include electro-optic sampling, transient probes, and optical clocks. More recently the frequency combs comprising these pulses have been applied to innovative methods of Arbitrary Waveform Generation (AWG) in the optical domain. Temporal stability in certain of these applications assumes the utmost importance. A proven approach to address the key issue, entails a significant reduction in system dimensions by means of an Erbium-Doped Waveguide Amplifier (EDWA), which can minimize adverse effects of thermal gradients. To further enhance the long term stability, a Pound-Drever-Hall (PDH) technique can be used to lock the laser to a known frequency reference, in effect allowing the cavity to compensate for the laser's drift. We report for the first time to our knowledge the result of incorporating PDH stabilization in an Erbium-Doped Waveguide Laser (EDWL), and compare this with a commercially available Erbium Doped Fiber Laser (EDFL).
Download or read book Handbook of Laser Technology and Applications written by Colin Webb and published by CRC Press. This book was released on 2020-09-29 with total page 1266 pages. Available in PDF, EPUB and Kindle. Book excerpt: The invention of the laser was one of the towering achievements of the twentieth century. At the opening of the twenty-first century we are witnessing the burgeoning of the myriad technical innovations to which that invention has led. The Handbook of Laser Technology and Applications is a practical and long-lasting reference source for scientists and engineers who work with lasers. The Handbook provides, a comprehensive guide to the current status of lasers and laser systems; it is accessible to science or engineering graduates needing no more than standard undergraduate knowledge of optics. Whilst being a self-contained reference work, the Handbook provides extensive references to contemporary work, and is a basis for studying the professional journal literature on the subject. It covers applications through detailed case studies, and is therefore well suited to readers who wish to use it to solve specific problems of their own. The first of the three volumes comprises an introduction to the basic scientific principles of lasers, laser beams and non-linear optics. The second volume describes the mechanisms and operating characteristics of specific types of laser including crystalline solid - state lasers, semiconductor diode lasers, fibre lasers, gas lasers, chemical lasers, dye lasers and many others as well as detailing the optical and electronic components which tailor the laser's performance and beam delivery systems. The third volume is devoted to case studies of applications in a wide range of subjects including materials processing, optical measurement techniques, medicine, telecommunications, data storage, spectroscopy, earth sciences and astronomy, and plasma fusion research. This vast compendium of knowledge on laser science and technology is the work of over 130 international experts, many of whom are recognised as the world leaders in their respective fields. Whether the reader is engaged in the science, technology, industrial or medical applications of lasers or is researching the subject as a manager or investor in technical enterprises they cannot fail to be informed and enlightened by the wide range of information the Handbook supplies.
Download or read book Proceedings of the Annual Symposium on Frequency Control written by and published by . This book was released on 1975 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
