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- W2593555373 abstract "SWIFTS<sup>TM</sup> technology has been known for over five years to offer compact and high-resolution laser spectrum analyzers. The increase of wavelength monitoring demand with even better accuracy and resolution has pushed the development of a wavelength meter based on SWIFTS<sup>TM</sup> technology, named LW-10. As a reminder, SWIFTS<sup>TM</sup> principle consists in a waveguide in which a stationary wave is created, sampled and read out by a linear image sensor array. Due to its inherent properties (non-uniform subsampling) and aliasing signal (as presented in Shannon-Nyquist criterion), the system offers short spectral window bandwidths thus needs an a priori on the working wavelength and thermal monitoring. Although SWIFTS<sup>TM</sup>-based devices are barely sensitive to atmospheric pressure, temperature control is a key factor to master both high accuracy and wavelength meter resolution. Temperature control went from passive (temperature probing only) to active control (Peltier thermoelectric cooler) with milli-degree accuracy. The software part consists in dropping the Fourier-like transform, for a least-squares method directly on the interference pattern. Moreover, the consideration of the system’s chromatic behavior provides a signature for automated wavelength detection and discrimination. This SWIFTS<sup>TM</sup>-based new device - LW-10 - shows outstanding results in terms of absolute accuracy, wavelength meter resolution as well as calibration robustness within a compact device, compared to other existing technologies. On the 630 – 1100 nm range, the final device configuration allows pulsed or CW lasers monitoring with 20 MHz resolution and 200 MHz absolute accuracy. Non-exhaustive applications include tunable laser control and frequency locking experiments" @default.
- W2593555373 created "2017-03-16" @default.
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- W2593555373 date "2017-02-20" @default.
- W2593555373 modified "2023-10-15" @default.
- W2593555373 title "Development of an integrated sub-picometric SWIFTS-based wavelength meter" @default.
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- W2593555373 doi "https://doi.org/10.1117/12.2249860" @default.
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