Bi-stability and period-doubling cascade of frequency combs in exceptional-point lasers
Recent studies have demonstrated that a laser can self-generate frequency combs when tuned near an exceptional point (EP), where two cavity modes coalesce. These EP combs induce periodic modulation of the population inversion in the gain medium, and their repetition rate is independent of the laser...
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| Format: | Article |
| Language: | English |
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De Gruyter
2025-05-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2025-0069 |
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| _version_ | 1849471404138823680 |
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| author | Gao Xingwei He Hao Chow Weng W. Cerjan Alexander Hsu Chia Wei |
| author_facet | Gao Xingwei He Hao Chow Weng W. Cerjan Alexander Hsu Chia Wei |
| author_sort | Gao Xingwei |
| collection | DOAJ |
| description | Recent studies have demonstrated that a laser can self-generate frequency combs when tuned near an exceptional point (EP), where two cavity modes coalesce. These EP combs induce periodic modulation of the population inversion in the gain medium, and their repetition rate is independent of the laser cavity’s free spectral range. In this work, we perform a stability analysis that reveals two notable properties of EP combs, bi-stability and a period-doubling cascade. The period-doubling cascade enables halving of the repetition rate while maintaining the comb’s total bandwidth, presenting opportunities for the design of highly compact frequency comb generators. |
| format | Article |
| id | doaj-art-06e131d9725144f088da9c8fc60a60e9 |
| institution | Kabale University |
| issn | 2192-8614 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-06e131d9725144f088da9c8fc60a60e92025-08-20T03:24:51ZengDe GruyterNanophotonics2192-86142025-05-0114132259226610.1515/nanoph-2025-0069Bi-stability and period-doubling cascade of frequency combs in exceptional-point lasersGao Xingwei0He Hao1Chow Weng W.2Cerjan Alexander3Hsu Chia Wei4Ming Hsieh Department of Electrical and Computer Engineering, 5116University of Southern California, Los Angeles, CA, 90089, USAMing Hsieh Department of Electrical and Computer Engineering, 5116University of Southern California, Los Angeles, CA, 90089, USACenter for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, NM, 87185, USACenter for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, NM, 87185, USAMing Hsieh Department of Electrical and Computer Engineering, 5116University of Southern California, Los Angeles, CA, 90089, USARecent studies have demonstrated that a laser can self-generate frequency combs when tuned near an exceptional point (EP), where two cavity modes coalesce. These EP combs induce periodic modulation of the population inversion in the gain medium, and their repetition rate is independent of the laser cavity’s free spectral range. In this work, we perform a stability analysis that reveals two notable properties of EP combs, bi-stability and a period-doubling cascade. The period-doubling cascade enables halving of the repetition rate while maintaining the comb’s total bandwidth, presenting opportunities for the design of highly compact frequency comb generators.https://doi.org/10.1515/nanoph-2025-0069frequency combsexceptional pointslasers |
| spellingShingle | Gao Xingwei He Hao Chow Weng W. Cerjan Alexander Hsu Chia Wei Bi-stability and period-doubling cascade of frequency combs in exceptional-point lasers Nanophotonics frequency combs exceptional points lasers |
| title | Bi-stability and period-doubling cascade of frequency combs in exceptional-point lasers |
| title_full | Bi-stability and period-doubling cascade of frequency combs in exceptional-point lasers |
| title_fullStr | Bi-stability and period-doubling cascade of frequency combs in exceptional-point lasers |
| title_full_unstemmed | Bi-stability and period-doubling cascade of frequency combs in exceptional-point lasers |
| title_short | Bi-stability and period-doubling cascade of frequency combs in exceptional-point lasers |
| title_sort | bi stability and period doubling cascade of frequency combs in exceptional point lasers |
| topic | frequency combs exceptional points lasers |
| url | https://doi.org/10.1515/nanoph-2025-0069 |
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