Showing papers by "Din Ping Tsai published in 1995"
TL;DR: In this paper, the authors used a metallically coated fiber probe with a well defined aperture at the end as in near-field scanning optical microscopy (NSOM) to obtain good quality near field images.
10 citations
30 Mar 1995
TL;DR: Apertured photon scanning tunneling microscopy (APSTM) was used to image the internal structure of an etched optical fiber with an intracore Bragg grating as discussed by the authors.
Abstract: Apertured photon scanning tunneling microscopy (APSTM) was used to image the internal structure of an etched optical fiber with an intracore Bragg grating. Direct evidence of the subwavelength periodic variation of the index of refraction along the fiber is obtained by probing evanescent field intensity modulated by the etched fiber grating structure. The images we observed suggests local non-uniformity in the grating structure. Local anomalies appear in the values of the grating spacing. The modulation of the evanescent field intensity originates from variations in the index of refraction as well as from surface structure induced by etching of the fiber.
1 citations