Modulation Characteristics of Period-One Oscillations in Quantum Cascade Lasers
Quantum cascade lasers subject to tilted optical feedback produce periodic oscillations, quasi-periodic oscillations, and low-frequency oscillations. This work presents the modulation characteristics of period-one (P1) oscillations in a quantum cascade laser with tilted optical feedback. The electri...
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| Format: | Article |
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MDPI AG
2021-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/24/11730 |
| _version_ | 1797506789171789824 |
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| author | Binbin Zhao Yibo Peng Xingguang Wang Cheng Wang |
| author_facet | Binbin Zhao Yibo Peng Xingguang Wang Cheng Wang |
| author_sort | Binbin Zhao |
| collection | DOAJ |
| description | Quantum cascade lasers subject to tilted optical feedback produce periodic oscillations, quasi-periodic oscillations, and low-frequency oscillations. This work presents the modulation characteristics of period-one (P1) oscillations in a quantum cascade laser with tilted optical feedback. The electrical signal at the oscillation frequency is more than 50 dB higher than the noise level, and the electrical linewidth is less than 2.0 kHz. This electrical linewidth is about four orders of magnitude narrower than the optical linewidth (around 16 MHz) of the free-running laser, which suggests that the optical sidebands induced by the P1 oscillations are highly coherent with the main optical mode. In addition, the modulation depth of the optical signal is found to be in the range of 1% to 3.5%. In addition, it is verified in the simulations that the P1 oscillations induce not only amplitude modulation but also frequency modulation due to the phase-amplitude coupling effect. |
| first_indexed | 2024-03-10T04:37:29Z |
| format | Article |
| id | doaj.art-3bd600730b11426f8a94eabc960e6cd4 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T04:37:29Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-3bd600730b11426f8a94eabc960e6cd42023-11-23T03:37:28ZengMDPI AGApplied Sciences2076-34172021-12-0111241173010.3390/app112411730Modulation Characteristics of Period-One Oscillations in Quantum Cascade LasersBinbin Zhao0Yibo Peng1Xingguang Wang2Cheng Wang3School of Information Science and Technology, ShanghaiTech University, Shanghai 201210, ChinaSchool of Information Science and Technology, ShanghaiTech University, Shanghai 201210, ChinaSchool of Information Science and Technology, ShanghaiTech University, Shanghai 201210, ChinaSchool of Information Science and Technology, ShanghaiTech University, Shanghai 201210, ChinaQuantum cascade lasers subject to tilted optical feedback produce periodic oscillations, quasi-periodic oscillations, and low-frequency oscillations. This work presents the modulation characteristics of period-one (P1) oscillations in a quantum cascade laser with tilted optical feedback. The electrical signal at the oscillation frequency is more than 50 dB higher than the noise level, and the electrical linewidth is less than 2.0 kHz. This electrical linewidth is about four orders of magnitude narrower than the optical linewidth (around 16 MHz) of the free-running laser, which suggests that the optical sidebands induced by the P1 oscillations are highly coherent with the main optical mode. In addition, the modulation depth of the optical signal is found to be in the range of 1% to 3.5%. In addition, it is verified in the simulations that the P1 oscillations induce not only amplitude modulation but also frequency modulation due to the phase-amplitude coupling effect.https://www.mdpi.com/2076-3417/11/24/11730quantum cascade lasersoptical feedbackperiod-one oscillationsmodulation characteristics |
| spellingShingle | Binbin Zhao Yibo Peng Xingguang Wang Cheng Wang Modulation Characteristics of Period-One Oscillations in Quantum Cascade Lasers Applied Sciences quantum cascade lasers optical feedback period-one oscillations modulation characteristics |
| title | Modulation Characteristics of Period-One Oscillations in Quantum Cascade Lasers |
| title_full | Modulation Characteristics of Period-One Oscillations in Quantum Cascade Lasers |
| title_fullStr | Modulation Characteristics of Period-One Oscillations in Quantum Cascade Lasers |
| title_full_unstemmed | Modulation Characteristics of Period-One Oscillations in Quantum Cascade Lasers |
| title_short | Modulation Characteristics of Period-One Oscillations in Quantum Cascade Lasers |
| title_sort | modulation characteristics of period one oscillations in quantum cascade lasers |
| topic | quantum cascade lasers optical feedback period-one oscillations modulation characteristics |
| url | https://www.mdpi.com/2076-3417/11/24/11730 |
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