Recirculating frequency-shifting loop for flexible optical chirp generation and FMCW LiDAR
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866910088326807552 |
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| author | Mrokon, Alexander Schöler, Sebastian Vossgrag, Leonard Buse, Karsten Breunig, Ingo |
| author_facet | Mrokon, Alexander Schöler, Sebastian Vossgrag, Leonard Buse, Karsten Breunig, Ingo |
| contents | A recirculating frequency-shifting loop (FSL) provides a highly flexible platform for generating coherent optically chirped light with tunable bandwidth, duration, chirp rate and repetition rate. The properties of the chirped light are controlled using low-frequency sinusoidal electronic drive signals, enabling deterministic waveform synthesis without complex high-speed electronics. We achieve chirp bandwidths of 10 GHz with a duration in the nanosecond regime, representing one of the fastest tunable laser sources to date. Using such chirped laser pulses, we demonstrate coherent FMCW LiDAR measurements over distances up to 3 m, highlighting the potential of FSL-based sources for compact, scalable and high-performance ranging systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_29355 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Recirculating frequency-shifting loop for flexible optical chirp generation and FMCW LiDAR Mrokon, Alexander Schöler, Sebastian Vossgrag, Leonard Buse, Karsten Breunig, Ingo Optics A recirculating frequency-shifting loop (FSL) provides a highly flexible platform for generating coherent optically chirped light with tunable bandwidth, duration, chirp rate and repetition rate. The properties of the chirped light are controlled using low-frequency sinusoidal electronic drive signals, enabling deterministic waveform synthesis without complex high-speed electronics. We achieve chirp bandwidths of 10 GHz with a duration in the nanosecond regime, representing one of the fastest tunable laser sources to date. Using such chirped laser pulses, we demonstrate coherent FMCW LiDAR measurements over distances up to 3 m, highlighting the potential of FSL-based sources for compact, scalable and high-performance ranging systems. |
| title | Recirculating frequency-shifting loop for flexible optical chirp generation and FMCW LiDAR |
| topic | Optics |
| url | https://arxiv.org/abs/2603.29355 |