abstract

• The effect of a gradual reduction of the fiber diameter on the acousto-optic (AO) interaction is reported. The experimental and theoretical study of the intermodal coupling induced by a flexural acoustic wave in a biconical tapered fiber shows that it is possible to shape the transmission spectrum, for example, substantially broadening the bandwidth of the resonant couplings. The geometry of the taper transitions can be regarded as an extra degree of freedom to design the AO devices. Optical bandwidths above 45 nm are reported in a tapered fiber with a gradual reduction of the fiber down to 70 μm diameter. The effect of including long taper transition is also reported in a double-tapered structure. A flat attenuation response is reported with 3-dB stopband bandwidth of 34 nm. © 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).

authors

• Andrés Bou M.V.
• Balderas Navarro Raúl Eduardo
• Bello Jimenez Miguel Ángel
• Cruz J.L.
• Cuadrado-Laborde C.
• Diez A.
• Ramírez-Meléndez G.
• Rodríguez Cobos Amparo

publication date

• 2016-01-01

published in

• Optical Engineering  Journal

keywords

• acousto-optic filter; acousto-optic interaction; biconical tapered fiber Adaptive optics; Bandwidth; Degrees of freedom (mechanics); Acousto-optic filters; Acousto-optic interaction; Degree of freedom; Intermodal coupling; Optical band width; Resonant couplings; Tapered fiber; Transmission spectrums; Fibers

Digital Object Identifier (DOI)

• 10.1117/1.OE.55.3.036105

start page

end page

volume

• 55

issue

• 3