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  • 1990-1994  (11)
  • 1
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    The Rb 780-nanometer Faraday anomalous dispersion optical filter: Theory and experiment (1994)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Faraday anomalous dispersion optical filter may provide ultra-high background noise rejection for free-space laser communications systems. The theoretical model for the filter is reported. The experimental measurements and their comparison with theoretical results are discussed. The results show that the filter can provide a 56-dB solar background noise rejection with about a 2-GHz transmission bandwidth and no image degradation. To further increase the background noise rejection, a composite Zeeman and Faraday anomalous dispersion optical filter is designed and experimentally demonstrated.
    Keywords: OPTICS
    Type: JPL, The Telecommunications and Data Acquisition Report; p 71-85
    Format: application/pdf
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  • 2
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    Faraday anomalous dispersion optical filters (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The present calculations of the performance of Faraday anomalous dispersion optical filters (FADOF) on IR transitions indicate that such filters may furnish high transmission, narrow-pass bandwidth, and low equivalent noise bandwidth under optimum operating conditions. A FADOF consists of an atomic vapor cell between crossed polarizers that are subject to a dc magnetic field along the optical path; when linearly polarized light travels along the direction of the magnetic field through the dispersive atomic vapor, a polarization rotation occurs. If FADOF conditions are suitably adjusted, a maximum transmission with very narrow bandwidth is obtained.
    Keywords: OPTICS
    Type: In: Lasers '91; Proceedings of the 14th International Conference on Lasers and Applications, San Diego, CA, Dec. 9-13, 1991 (A93-48751 20-36); p. 641-648.
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  • 3
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    A potassium Faraday anomalous dispersion optical filter (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The characteristics of a potassium Faraday anomalous dispersion optical filter operating on the blue and near infrared transitions are calculated. The results show that the filter can be designed to provide high transmission, very narrow pass bandwidth, and low equivalent noise bandwidth. The Faraday anomalous dispersion optical filter (FADOF) provides a narrow pass bandwidth (about GHz) optical filter for laser communications, remote sensing, and lidar. The general theoretical model for the FADOF has been established in our previous paper. In this paper, we have identified the optimum operational conditions for a potassium FADOF operating on the blue and infrared transitions. The signal transmission, bandwidth, and equivalent noise bandwidth (ENBW) are also calculated.
    Keywords: OPTICS
    Type: In: Free-space laser communication technologies IV; Proceedings of the 4th Conference, Los Angeles, CA, Jan. 23, 24, 1992 (A93-48376 20-17); p. 128-134.
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  • 4
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    A simple low loss technique for frequency locking lasers (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: We report the results of a novel method for frequency stabilizing laser diodes based on the resonant Faraday effects. A Faraday cell with crossed Brewster windows comprises the intracavity frequency selective element. In this arrangement a laser pull-in range of 4A was measured and the laser operated at a single frequency with a linewidth less than 6 Mhz.
    Keywords: LASERS AND MASERS
    Type: In: Free-space laser communication technologies IV; Proceedings of the 4th Conference, Los Angeles, CA, Jan. 23, 24, 1992 (A93-48376 20-17); p. 36-39.
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  • 5
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    The Stark anomalous dispersion optical filter: The theory (1994)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Stark anomalous dispersion optical filter is a wide-frequency-tunable ultra-narrow-bandwidth optical filter. The first theoretical investigation of this filter matched to the wavelength of a doubled Nd:YAG laser is reported. The calculations show that such a filter may provide above 80 percent transmission, and a noise equivalent bandwidth of 3 GHz.
    Keywords: OPTICS
    Type: JPL, The Telecommunications and Data Acquisition Report; p 14-21
    Format: application/pdf
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  • 6
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    Theoretical model for a Stark anomalous dispersion optical filter (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A theoretical model for the first atomic Stark anomalous dispersion optical filter is reported. The results show the filter may serve as a widely tunable narrow bandwidth and high throughput optical filter for freespace laser communications and remote sensing.
    Keywords: SPACE COMMUNICATIONS, SPACECRAFT COMMUNICATIONS, COMMAND AND TRACKING
    Type: (ISSN 0190-4132); : Composite material
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  • 7
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    Faraday anomalous dispersion optical filters (1993)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: The effect of Faraday anomalous dispersion optical filters on infrared and blue transitions of some alkali atoms is calculated. A composite system is designed to further increase the background noise rejection. The measured results of the solar background rejection and image quality through the filter are presented. The results show that the filter may provide high transmission and high background noise rejection with excellent image quality.
    Keywords: OPTICS
    Type: (ISSN 0190-4132); : Composite material
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  • 8
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    Theoretical model for a Faraday anomalous dispersion optical filter (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: A model for the Faraday anomalous dispersion optical filter is presented. The model predicts a bandwidth of 0.6 GHz and a transmission peak of 0.98 for a filter operating on the Cs (D2) line. The model includes hyperfine effects and is valid for arbitrary magnetic fields.
    Keywords: OPTICS
    Type: Optics Letters (ISSN 0146-9592); 16; 1617-161
    Format: text
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  • 9
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    Theoretical model for frequency locking a diode laser with a Faraday cell (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A new method was developed for frequency locking a diode lasers, called 'the Faraday anomalous dispersion optical transmitter (FADOT) laser locking', which is much simpler than other known locking schemes. The FADOT laser locking method uses commercial laser diodes with no antireflection coatings, an atomic Faraday cell with a single polarizer, and an output coupler to form a compound cavity. The FADOT method is vibration insensitive and exhibits minimal thermal expansion effects. The system has a frequency pull in the range of 443.2 GHz (9 A). The method has potential applications in optical communication, remote sensing, and pumping laser excited optical filters.
    Keywords: LASERS AND MASERS
    Type: Laser Diode Technology and Applications IV; Jan 20, 1992 - Jan 22, 1992; Los Angeles, CA; United States
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  • 10
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    Diode-laser frequency stabilization based on the resonant Faraday effect (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The authors present the results of a method for frequency stabilizing laser diodes based on the resonant Faraday effects. A Faraday cell in conjunction with a polarizer crossed with respect to the polarization of the laser diode comprises the intracavity frequency selective element. In this arrangement, a laser pull-in range of 9 A was measured, and the laser operated at a single frequency with a linewidth less than 6 MHz.
    Keywords: LASERS AND MASERS
    Type: IEEE Photonics Technology Letters (ISSN 1041-1135); 4; 94-96
    Format: text
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