Effect of the Coherence Time of the Semiconductor Laser Emitter on the Quality of Radio Signal Processing in the Optoelectronic Delay-Line Processor
The effect of the coherence time of the semiconductor laser emitter incorporated in the most commonly used optoelectronic radio signal processor (OERSP) based on a multitapped optical delay circuit (ODC) on the transmission gain and signal-to-noise ratio at the device output is studied by computer s...
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| Veröffentlicht in: | Bulletin of the Lebedev Physics Institute 2020-10, Vol.47 (10), p.291-295 |
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| container_title | Bulletin of the Lebedev Physics Institute |
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| creator | Alyoshin, A. V. Belkin, M. E. Gladyshev, I. V. Kanavin, A. P. Sigov, A. S. Fofanov, D. A. |
| description | The effect of the coherence time of the semiconductor laser emitter incorporated in the most commonly used optoelectronic radio signal processor (OERSP) based on a multitapped optical delay circuit (ODC) on the transmission gain and signal-to-noise ratio at the device output is studied by computer simulation in a widely used optoelectronic CAD tool. It is found that efficient operation of a practical device implies that its coherence time should be shorter than the duration of the processed radio-frequency signal at least by an order of magnitude. Measurements of coherence times of three most commonly used modern emitters: the external-cavity-based laser, distributed feedback laser, and Fabry—Perot laser show that only the latter type can be efficiently used as a part of the studied OERSP with a four-tapped ODC based on 7-core optical fiber. |
| doi_str_mv | 10.3103/S1068335620100036 |
| format | Article |
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| subjects | Physics Physics and Astronomy |
| title | Effect of the Coherence Time of the Semiconductor Laser Emitter on the Quality of Radio Signal Processing in the Optoelectronic Delay-Line Processor |
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