Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laser
Abstract Precision applications including quantum computing and sensing, mmWave/RF generation, and metrology, demand widely tunable, ultra-low phase noise lasers. Today, these experiments employ table-scale systems with bulk-optics and isolators to achieve requisite noise, stability, and tunability....
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-07-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-61122-4 |
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| author | David A. S. Heim Debapam Bose Kaikai Liu Andrei Isichenko Daniel J. Blumenthal |
| author_facet | David A. S. Heim Debapam Bose Kaikai Liu Andrei Isichenko Daniel J. Blumenthal |
| author_sort | David A. S. Heim |
| collection | DOAJ |
| description | Abstract Precision applications including quantum computing and sensing, mmWave/RF generation, and metrology, demand widely tunable, ultra-low phase noise lasers. Today, these experiments employ table-scale systems with bulk-optics and isolators to achieve requisite noise, stability, and tunability. Photonic integration will enable scalable, reliable and portable solutions. Here we report a hybrid-integrated external cavity widely tunable laser stabilized to a 10 m-long integrated coil-resonator, achieving record-low 3 – 7 Hz fundamental linewidth across a 60 nm tuning range and 27 – 60 Hz integral linewidth with 1.8E-13 ADEV at 6.4 ms across 40 nm, delivering orders of magnitude frequency noise and integral linewidth reduction over state of the art. Stabilization is achieved without an optical isolator, leveraging resilience to optical feedback of 30 dB beyond that of commercial DFB lasers. The laser and reference cavity are fabricated in the same Si3N4 CMOS-compatible process, unlocking a path towards fully integrated visible to ShortWave-IR frequency-stabilized lasers. |
| format | Article |
| id | doaj-art-ea7af911b0124827a034aa57cd866e05 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-ea7af911b0124827a034aa57cd866e052025-08-20T03:37:37ZengNature PortfolioNature Communications2041-17232025-07-011611910.1038/s41467-025-61122-4Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laserDavid A. S. Heim0Debapam Bose1Kaikai Liu2Andrei Isichenko3Daniel J. Blumenthal4Department of Electrical and Computer Engineering, University of California Santa BarbaraDepartment of Electrical and Computer Engineering, University of California Santa BarbaraDepartment of Electrical and Computer Engineering, University of California Santa BarbaraDepartment of Electrical and Computer Engineering, University of California Santa BarbaraDepartment of Electrical and Computer Engineering, University of California Santa BarbaraAbstract Precision applications including quantum computing and sensing, mmWave/RF generation, and metrology, demand widely tunable, ultra-low phase noise lasers. Today, these experiments employ table-scale systems with bulk-optics and isolators to achieve requisite noise, stability, and tunability. Photonic integration will enable scalable, reliable and portable solutions. Here we report a hybrid-integrated external cavity widely tunable laser stabilized to a 10 m-long integrated coil-resonator, achieving record-low 3 – 7 Hz fundamental linewidth across a 60 nm tuning range and 27 – 60 Hz integral linewidth with 1.8E-13 ADEV at 6.4 ms across 40 nm, delivering orders of magnitude frequency noise and integral linewidth reduction over state of the art. Stabilization is achieved without an optical isolator, leveraging resilience to optical feedback of 30 dB beyond that of commercial DFB lasers. The laser and reference cavity are fabricated in the same Si3N4 CMOS-compatible process, unlocking a path towards fully integrated visible to ShortWave-IR frequency-stabilized lasers.https://doi.org/10.1038/s41467-025-61122-4 |
| spellingShingle | David A. S. Heim Debapam Bose Kaikai Liu Andrei Isichenko Daniel J. Blumenthal Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laser Nature Communications |
| title | Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laser |
| title_full | Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laser |
| title_fullStr | Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laser |
| title_full_unstemmed | Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laser |
| title_short | Hybrid integrated ultra-low linewidth coil stabilized isolator-free widely tunable external cavity laser |
| title_sort | hybrid integrated ultra low linewidth coil stabilized isolator free widely tunable external cavity laser |
| url | https://doi.org/10.1038/s41467-025-61122-4 |
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