1999
DOI: 10.1117/12.370328
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Effective index measurement of propagated modes in planar waveguide

Abstract: A method of index measurement, the so-called rn-line technique has been applied to measure the refractive index of planar waveguides fabricated by ion exchange method in BK7 substrate. By placing a prism coupler on the surface of the planar waveguide, the coupling angle of modes guided in the waveguide was measured. The prism has apex angle of 44.9° and is made of ZnSe with refractive index 2.59073 . The values of the coupling angles were then processed mathematically to obtain the effective indices of the gui… Show more

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Cited by 2 publications
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“…Knowing the mode related coupling angles, the effective refractive index of each mode can be obtained. [ 62 ] Figure a shows an example of a Transverse Magnetic (TM) light intensity profile retrieved by the camera (extracted from the measured image in the inset of the Figure) with ɵ the angle between the input beam and the insertion plane prism normal. For this sample the middle fringe corresponding to the guided mode is detected at −7.8°.…”
Section: Resultsmentioning
confidence: 99%
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“…Knowing the mode related coupling angles, the effective refractive index of each mode can be obtained. [ 62 ] Figure a shows an example of a Transverse Magnetic (TM) light intensity profile retrieved by the camera (extracted from the measured image in the inset of the Figure) with ɵ the angle between the input beam and the insertion plane prism normal. For this sample the middle fringe corresponding to the guided mode is detected at −7.8°.…”
Section: Resultsmentioning
confidence: 99%
“…Knowing the mode related coupling angles, the effective refractive index of each mode can be obtained. [62] S2 (Supporting Information). Figure 13b presents the TE and TM modes simulated using SIIO solver [63] on sapphire substrate (1.77 refractive index), corresponding to the measurement presented on the Figure 13a (sample C1, zone Z2).…”
Section: M-line Measurements In Linbo 3 Layersmentioning
confidence: 99%