A practical guide to feedback control for Pound-Drever-Hall laser linewidth narrowing
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| Main Authors: | , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866908497831002112 |
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| author | Wang, Wance Subhankar, Sarthak Britton, Joseph W. |
| author_facet | Wang, Wance Subhankar, Sarthak Britton, Joseph W. |
| contents | The Pound-Drever-Hall (PDH) technique for laser linewidth narrowing is widely used by AMO experimentalists. However, achieving a high-performance PDH locking requires substantial engineering experience, which is scattered across literature and often lacks a cohesive control-theory perspective. Excellent pedagogical papers exist on the theory of the PDH error signal but they rarely cover feedback control. General-purpose control theory literature seldom discuss PDH laser locking specifically. Although excellent PDH review articles provide thorough knowledge and practice on both aspects but they are not reader-friendly. We extend prior works by addressing component choice and loop tuning using modern tools like a vector network analyzer. We organize multifaceted engineering considerations systematically, grounded in feedback control principles. Our target reader is researchers setting up a PDH laser lock for the first time; we eschew advanced topics like minimizing residual amplitude modulation (RAM). Our guidance is illustrated by step-by-step optimization of the lock for a 1650 nm ECDL. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_04635 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A practical guide to feedback control for Pound-Drever-Hall laser linewidth narrowing Wang, Wance Subhankar, Sarthak Britton, Joseph W. Quantum Physics Atomic Physics Optics The Pound-Drever-Hall (PDH) technique for laser linewidth narrowing is widely used by AMO experimentalists. However, achieving a high-performance PDH locking requires substantial engineering experience, which is scattered across literature and often lacks a cohesive control-theory perspective. Excellent pedagogical papers exist on the theory of the PDH error signal but they rarely cover feedback control. General-purpose control theory literature seldom discuss PDH laser locking specifically. Although excellent PDH review articles provide thorough knowledge and practice on both aspects but they are not reader-friendly. We extend prior works by addressing component choice and loop tuning using modern tools like a vector network analyzer. We organize multifaceted engineering considerations systematically, grounded in feedback control principles. Our target reader is researchers setting up a PDH laser lock for the first time; we eschew advanced topics like minimizing residual amplitude modulation (RAM). Our guidance is illustrated by step-by-step optimization of the lock for a 1650 nm ECDL. |
| title | A practical guide to feedback control for Pound-Drever-Hall laser linewidth narrowing |
| topic | Quantum Physics Atomic Physics Optics |
| url | https://arxiv.org/abs/2412.04635 |