Frequency combs in optically injected terahertz ring quantum cascade lasers
Quantum cascade lasers (QCLs) have emerged as promising candidates for generating chip-scale frequency combs in mid-infrared and terahertz wavelengths. In this work, we demonstrate frequency comb formation in ring terahertz QCLs using the injection of light from a distributed feedback (DFB) laser. T...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2023-12-01
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| Series: | APL Photonics |
| Online Access: | http://dx.doi.org/10.1063/5.0173912 |
| _version_ | 1797367009798782976 |
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| author | Md Istiak Khan Zhenyang Xiao Sadhvikas J. Addamane David Burghoff |
| author_facet | Md Istiak Khan Zhenyang Xiao Sadhvikas J. Addamane David Burghoff |
| author_sort | Md Istiak Khan |
| collection | DOAJ |
| description | Quantum cascade lasers (QCLs) have emerged as promising candidates for generating chip-scale frequency combs in mid-infrared and terahertz wavelengths. In this work, we demonstrate frequency comb formation in ring terahertz QCLs using the injection of light from a distributed feedback (DFB) laser. The DFB design frequency is chosen to match the modes of the ring cavity (near 3.3 THz), and light from the DFB is injected into the ring QCL via a bus waveguide. By controlling the power and frequency of the optical injection, we show that combs can be selectively formed and controlled in the ring cavity. Numerical modeling suggests that this comb is primarily frequency-modulated in character, with the injection serving to trigger comb formation. We also show that the ring can be used as a filter to control the output of the DFB QCL, potentially being of interest in terahertz photonic integrated circuits. Our work demonstrates that waveguide couplers are a compelling approach for injecting and extracting radiation from ring terahertz combs and offer exciting possibilities for the generation of new comb states in terahertz, such as frequency-modulated waves, solitons, and more. |
| first_indexed | 2024-03-08T17:12:46Z |
| format | Article |
| id | doaj.art-5cd734ec63a84eb9bc1caeab2bf91d97 |
| institution | Directory Open Access Journal |
| issn | 2378-0967 |
| language | English |
| last_indexed | 2024-03-08T17:12:46Z |
| publishDate | 2023-12-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Photonics |
| spelling | doaj.art-5cd734ec63a84eb9bc1caeab2bf91d972024-01-03T19:46:13ZengAIP Publishing LLCAPL Photonics2378-09672023-12-01812121302121302-810.1063/5.0173912Frequency combs in optically injected terahertz ring quantum cascade lasersMd Istiak Khan0Zhenyang Xiao1Sadhvikas J. Addamane2David Burghoff3Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USAElectrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USACenter for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87123, USAElectrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USAQuantum cascade lasers (QCLs) have emerged as promising candidates for generating chip-scale frequency combs in mid-infrared and terahertz wavelengths. In this work, we demonstrate frequency comb formation in ring terahertz QCLs using the injection of light from a distributed feedback (DFB) laser. The DFB design frequency is chosen to match the modes of the ring cavity (near 3.3 THz), and light from the DFB is injected into the ring QCL via a bus waveguide. By controlling the power and frequency of the optical injection, we show that combs can be selectively formed and controlled in the ring cavity. Numerical modeling suggests that this comb is primarily frequency-modulated in character, with the injection serving to trigger comb formation. We also show that the ring can be used as a filter to control the output of the DFB QCL, potentially being of interest in terahertz photonic integrated circuits. Our work demonstrates that waveguide couplers are a compelling approach for injecting and extracting radiation from ring terahertz combs and offer exciting possibilities for the generation of new comb states in terahertz, such as frequency-modulated waves, solitons, and more.http://dx.doi.org/10.1063/5.0173912 |
| spellingShingle | Md Istiak Khan Zhenyang Xiao Sadhvikas J. Addamane David Burghoff Frequency combs in optically injected terahertz ring quantum cascade lasers APL Photonics |
| title | Frequency combs in optically injected terahertz ring quantum cascade lasers |
| title_full | Frequency combs in optically injected terahertz ring quantum cascade lasers |
| title_fullStr | Frequency combs in optically injected terahertz ring quantum cascade lasers |
| title_full_unstemmed | Frequency combs in optically injected terahertz ring quantum cascade lasers |
| title_short | Frequency combs in optically injected terahertz ring quantum cascade lasers |
| title_sort | frequency combs in optically injected terahertz ring quantum cascade lasers |
| url | http://dx.doi.org/10.1063/5.0173912 |
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