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Article History

Received: 6 July 2023

Accepted: 29 January 2026

First Online: 12 February 2026

Declarations

:

: The authors declare no competing interests.

: We the undersigned that the manuscript entitled “Narrow-Bandwidth Optical four-Channel Demultiplexer based on a Compact Silicon Photonic Crystal Ring Resonator” is original, has not been thoroughly or partly published before, and is not currently considered for publication elsewhere. Also, results are presented honestly, and without fabrication, falsification, or inappropriate data manipulation. We confirm that the manuscript has been read and approved by all named authors and that there are no other persons who satisfied the criteria for authorship but are not listed. We further confirm that all have agreed with the order of authors listed in the manuscript of us.