Developing high-power and wide-bandwidth time-stretch lightsource using arrayed waveguide grating devices

H. Sera; S. Shimizu; H. Kawagoe; J. Sahara; K. Watanabe; K. Shinoyama; T. Nagashima; T. Yokoyama; A. Ikarashi; G. Yamada

doi:10.1117/12.2692207

12 March 2024 Developing high-power and wide-bandwidth time-stretch lightsource using arrayed waveguide grating devices

H. Sera, S. Shimizu, H. Kawagoe, J. Sahara, K. Watanabe, K. Shinoyama, T. Nagashima, T. Yokoyama, A. Ikarashi, G. Yamada

Author Affiliations +

Proceedings Volume 12870, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications IX; 1287003 (2024) https://doi.org/10.1117/12.2692207
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

Time-stretch spectroscopic method, employing chirped optical pulses, has significant attention due to its remarkable spectral acquisition rate. However, its application is limited due to the low light throughput and narrow bandwidth of previous time-stretching systems. We present a high-power time-stretch near-infrared (NIR) light source, leveraging Arrayed Waveguide Gratings (AWGs), designed to overcome these limitations. This novel configuration utilizes AWGs and short optical fibers to achieve significant chromatic dispersion with high throughput, yielding output power of 90 mW and spectral width of 400 nm. As a result, we clearly observed the absorption spectra for low transmittance samples within a millisecond. This represents a significant step forward for transmittance based industrial NIR spectroscopy applications.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

H. Sera, S. Shimizu, H. Kawagoe, J. Sahara, K. Watanabe, K. Shinoyama, T. Nagashima, T. Yokoyama, A. Ikarashi, and G. Yamada "Developing high-power and wide-bandwidth time-stretch lightsource using arrayed waveguide grating devices", Proc. SPIE 12870, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications IX, 1287003 (12 March 2024); https://doi.org/10.1117/12.2692207

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