AI Article Synopsis
- Rayleigh speckle from single-mode fibers can be utilized for spectrum measurement due to its dependence on the wavelength of incident light.
- A novel wavemeter is proposed that uses optical time domain reflectometry to achieve high spectral resolution, with measurements showing 6 femtometers (fm) at a 2 µs probe pulse, and an improved resolution of 0.4 fm through a correlation coefficient method.
- The system is demonstrated to effectively resolve dynamic multi-wavelength signals with a time resolution of 25 µs, offering a compact and cost-effective option with excellent spectral performance.
Article Abstract
The characteristics of Rayleigh speckle generated from a single-mode fiber are related to the wavelength of the incident lightwave, which makes it possible to use Rayleigh speckle for spectrum measurement. Based on this feature, we propose, to the best of our knowledge, a novel wavemeter with high resolution realized using optical time domain reflectometry to obtain Rayleigh speckle. We show that the spectral resolution is inverse to the probe pulse width, with a spectral resolution of 6 fm corresponding to a 2 µs probe pulse. A correlation coefficient method is introduced to further increase the spectral resolution from 6 to 0.4 fm. Moreover, it is experimentally demonstrated that the system has the capability to resolve dynamic multi-wavelength signals with 25 µs time resolution. The proposed high-resolution wavemeter is a good prospect for cost effectiveness, compactness, and excellent performance of spectral resolution.
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| http://dx.doi.org/10.1364/OL.384248 | DOI Listing |
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