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FPGA-based residual amplitude modulation suppression and control for compact atomic clocks | | Tin Nghia Nguyen
; Thomas R. Schibli
; | | Date: |
1 Nov 2023 | | Abstract: | We designed an FPGA fabric to provide phase modulation techniques to lock lasers to optical frequency references. The method incorporates an active residual-amplitude-modulation (RAM) suppression scheme that relies on complex modulation. All the required servos to construct an optical atomic clock are incorporated onto the same low-cost, commercial FPGA chip. We demonstrate a reliable, long-term RAM suppression 60 dB with the remaining RAM level at -100 dBc and an improved stability of three decades when applied on a two-photon rubidium clock. | | Source: | arXiv, 2311.00216 | | Services: | Forum | Review | PDF | Favorites | |
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