Amplification of photon echo signals for photon-echo-based optical storage and optical processing devices

Mingzhen Tian; Nandigana K. Krishna Mohan; Ulf Elman; Baozhu Luo; Stefan Kroell

doi:10.1117/12.330413

5 November 1998 Amplification of photon echo signals for photon-echo-based optical storage and optical processing devices

Mingzhen Tian, Nandigana K. Krishna Mohan, Ulf Elman, Baozhu Luo, Stefan Kroell

Author Affiliations +

Proceedings Volume 3468, Advanced Optical Memories and Interfaces to Computer Storage; (1998) https://doi.org/10.1117/12.330413
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

In photon-echo-based optical data storage and data processing the photon echo output intensity generally is about 0.1 - 1% of the input intensity. Many devices, such as processors would require that the photon echo output is used as an input to a new photon echo process. To obtain a sufficient signal-to- noise it would be necessary to first amplify the photon echo output signal. In this paper Pr-doped ZBLAN fibers are used to amplify the photon echo signals generated in Pr-doped Y₂SiO₅ at 606 nm. The fiber amplifier is pumped by the 476 nm output from an Ar-ion laser. Mirror-less lasing due to reflection at the fiber ends is eliminated by cleaving the fiber ends at an angle. The upper limit of the gain in a fiber is set by the core refractive index and the fiber numerical aperture. By changing from a fiber with numerical aperture of 0.4 to one with 0.15, the gain obtained at 606 nm is increased from 45 to 330.

Citation Download Citation

Mingzhen Tian, Nandigana K. Krishna Mohan, Ulf Elman, Baozhu Luo, and Stefan Kroell "Amplification of photon echo signals for photon-echo-based optical storage and optical processing devices", Proc. SPIE 3468, Advanced Optical Memories and Interfaces to Computer Storage, (5 November 1998); https://doi.org/10.1117/12.330413

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