Improvement of Output Characteristics of a Large-Mode-Area Er-Doped Fiber Amplifier Pulse Pumped by a Cascaded Raman Fiber Laser With a Low Repetition Frequency
We improve the output of a MOPA system that emits single-frequency high-energy optical pulses using a large mode area Er-doped fiber amplifier pumped by a cascaded Raman fiber laser with a low 150 Hz repetition frequency. It is found that the unwanted light generated in the cascaded Raman fiber lase...
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IEEE
2023-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/10258443/ |
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| author | Junia Nomura Nobuo Ohata |
| author_facet | Junia Nomura Nobuo Ohata |
| author_sort | Junia Nomura |
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| description | We improve the output of a MOPA system that emits single-frequency high-energy optical pulses using a large mode area Er-doped fiber amplifier pumped by a cascaded Raman fiber laser with a low 150 Hz repetition frequency. It is found that the unwanted light generated in the cascaded Raman fiber laser at the same time as the pump light saps the gain of the amplifier and degrades its output characteristics. By combining the removal of unwanted light with a pulse pump technique, the pulse energy is improved from less than 1.0 mJ to 1.2 mJ with at the same time a SNR of 30 dB compared to 19 dB before the improvement. The percentage of power in the signal also improves from 61.0% to over 90.7%. |
| format | Article |
| id | doaj-art-d607bf4c96004100a6b6df750a16a2f1 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-d607bf4c96004100a6b6df750a16a2f12025-08-20T03:32:55ZengIEEEIEEE Photonics Journal1943-06552023-01-011551610.1109/JPHOT.2023.331790710258443Improvement of Output Characteristics of a Large-Mode-Area Er-Doped Fiber Amplifier Pulse Pumped by a Cascaded Raman Fiber Laser With a Low Repetition FrequencyJunia Nomura0https://orcid.org/0000-0002-1322-4738Nobuo Ohata1https://orcid.org/0000-0002-6446-7959Information Technology R&D Center, Mitsubishi Electric Corporation, Kamakura, Kanagawa, JapanInformation Technology R&D Center, Mitsubishi Electric Corporation, Kamakura, Kanagawa, JapanWe improve the output of a MOPA system that emits single-frequency high-energy optical pulses using a large mode area Er-doped fiber amplifier pumped by a cascaded Raman fiber laser with a low 150 Hz repetition frequency. It is found that the unwanted light generated in the cascaded Raman fiber laser at the same time as the pump light saps the gain of the amplifier and degrades its output characteristics. By combining the removal of unwanted light with a pulse pump technique, the pulse energy is improved from less than 1.0 mJ to 1.2 mJ with at the same time a SNR of 30 dB compared to 19 dB before the improvement. The percentage of power in the signal also improves from 61.0% to over 90.7%.https://ieeexplore.ieee.org/document/10258443/Doped fiber amplifiersEr-doped fibershigh power amplifierslidarpulsed laserspump lasers |
| spellingShingle | Junia Nomura Nobuo Ohata Improvement of Output Characteristics of a Large-Mode-Area Er-Doped Fiber Amplifier Pulse Pumped by a Cascaded Raman Fiber Laser With a Low Repetition Frequency IEEE Photonics Journal Doped fiber amplifiers Er-doped fibers high power amplifiers lidar pulsed lasers pump lasers |
| title | Improvement of Output Characteristics of a Large-Mode-Area Er-Doped Fiber Amplifier Pulse Pumped by a Cascaded Raman Fiber Laser With a Low Repetition Frequency |
| title_full | Improvement of Output Characteristics of a Large-Mode-Area Er-Doped Fiber Amplifier Pulse Pumped by a Cascaded Raman Fiber Laser With a Low Repetition Frequency |
| title_fullStr | Improvement of Output Characteristics of a Large-Mode-Area Er-Doped Fiber Amplifier Pulse Pumped by a Cascaded Raman Fiber Laser With a Low Repetition Frequency |
| title_full_unstemmed | Improvement of Output Characteristics of a Large-Mode-Area Er-Doped Fiber Amplifier Pulse Pumped by a Cascaded Raman Fiber Laser With a Low Repetition Frequency |
| title_short | Improvement of Output Characteristics of a Large-Mode-Area Er-Doped Fiber Amplifier Pulse Pumped by a Cascaded Raman Fiber Laser With a Low Repetition Frequency |
| title_sort | improvement of output characteristics of a large mode area er doped fiber amplifier pulse pumped by a cascaded raman fiber laser with a low repetition frequency |
| topic | Doped fiber amplifiers Er-doped fibers high power amplifiers lidar pulsed lasers pump lasers |
| url | https://ieeexplore.ieee.org/document/10258443/ |
| work_keys_str_mv | AT junianomura improvementofoutputcharacteristicsofalargemodeareaerdopedfiberamplifierpulsepumpedbyacascadedramanfiberlaserwithalowrepetitionfrequency AT nobuoohata improvementofoutputcharacteristicsofalargemodeareaerdopedfiberamplifierpulsepumpedbyacascadedramanfiberlaserwithalowrepetitionfrequency |