A
Apichai Bhatranand
Researcher at King Mongkut's University of Technology Thonburi
Publications - 31
Citations - 47
Apichai Bhatranand is an academic researcher from King Mongkut's University of Technology Thonburi. The author has contributed to research in topics: Interferometry & Long-period fiber grating. The author has an hindex of 3, co-authored 28 publications receiving 29 citations. Previous affiliations of Apichai Bhatranand include Shibaura Institute of Technology.
Papers
More filters
Proceedings ArticleDOI
Suitable Feature Selection for OSA Classification Based on Snoring Sounds
TL;DR: This research investigates suitable features of snoring sound records for Obstructive Sleep Apnea (OSA) classification with the help of overnight multichannel polysomnography assessment and linear discriminant analysis with the leaveone-out cross validation.
Polarization Phase-shifting Technique for the Determination of a Transparent Thin Film’s Thickness Using a Modified Sagnac Interferometer
TL;DR: In this paper, a modified Sagnac interferometer was used to investigate the thickness of Ta2O5 thin films on BK7 substrates, where incident light is split by a polarizing beam splitter into two orthogonal linearly polarized beams traveling in opposite directions, and a quarter-wave plate is inserted into the common path to create an unbalanced phase condition.
Proceedings ArticleDOI
Resonant wavelength observation by 3D printed mechanically induced long-period fiber grating device
Ravivudh Khun-in,Masahiro Takagi,Kouya Nanjo,Yuttapong Jiraraksopakun,Apichai Bhatranand,Hideki Yokoi +5 more
TL;DR: In this article, a mechanically induced long-period fiber grating device is fabricated using a 3D printer and the results show that with the 10 nm of grating period difference, the resonant wavelength can be shifted up to 19 nm.
Proceedings ArticleDOI
Monolithic integration of semiconductor optical amplifier and photodiode through quantum well intermixing
TL;DR: In this paper, a two-stage laser-induced quantum well intermixing process was used for the integration of optical preamplifier and photodiode, achieving a peak responsivity of 5.7 A/W and a 3-dB bandwidth of 14.7 GHz.
Journal ArticleDOI
Utilization of the cyclic interferometer in polarization phase-shifting technique to determine the thickness of transparent thin-films
Rapeepan Kaewon,Chutchai Pawong,Ratchapak Chitaree,Tossaporn Lertvanithphol,Apichai Bhatranand +4 more
TL;DR: In this article, a cyclic interferometric configuration is chosen to maintain the stability of the operation against external vibrations, and a wave plate is inserted into the common paths to introduce an intrinsic phase difference between the orthogonal polarized beams.