Fiber-optic evanescent field modulator using a magnetic fluid as the cladding

A kind of fiber-optic modulation-depth-tunable modulator is developed in this paper. In this modulator, a magnetic fluid is used as the cladding of the drawn fiber, which attenuates the evanescent field when the light is guided in the fiber. Because the attenuation depends on the strength of the applied external magnetic field, the emergent light intensity from the fiber is modulated with the change of the magnetic field strength. The response times, i.e., the span for the light intensity to reach the final steady value from the time when the magnetic field is turned on or off, are evaluated quantitatively.

[1]  H. Tai,et al.  Fiber-optic evanescent-wave methane-gas sensor using optical absorption for the 3.392-microm line of a He-Ne laser. , 1987, Optics letters.

[2]  Phillip H. Paul,et al.  Fiber‐optic evanescent field absorption sensor , 1987 .

[3]  J. Murphy,et al.  Evanescent wave absorption spectroscopy using multimode fibers , 1990 .

[4]  G. Sigel,et al.  Remote fiber-optic chemical sensing using evanescent-wave interactions in chalcogenide glass fibers. , 1991, Applied optics.

[5]  T. Du,et al.  THERMAL LENS COUPLED MAGNETO-OPTICAL EFFECT IN A FERROFLUID , 1994 .

[6]  Tengda Du,et al.  Nonlinear optical effects in ferrofluids induced by temperature and concentration cross coupling , 1998 .

[7]  J. M. Wu,et al.  Evidence of multiple states of ordered structures and a phase transition in magnetic fluid films under perpendicular magnetic fields , 1999 .

[8]  Sang Ju Park,et al.  An experimental study of light modulator using magnetic fluid , 1999 .

[9]  Shieh-Yueh Yang,et al.  Origin of field-dependent optical transmission of magnetic fluid films , 2001 .

[10]  Shieh-Yueh Yang,et al.  Novel properties and applications in magnetic fluids , 2001 .

[11]  Shieh-Yueh Yang,et al.  Magnetically-modulated refractive index of magnetic fluid films , 2002 .

[12]  S. Turner,et al.  Zero-Mode Waveguides for Single-Molecule Analysis at High Concentrations , 2003, Science.

[13]  Shengli Pu,et al.  Laser self-induced thermo-optical effects in a magnetic fluid , 2004 .

[14]  Limin Tong,et al.  Single-mode guiding properties of subwavelength-diameter silica and silicon wire waveguides. , 2004, Optics express.

[15]  Jen-Jie Chieh,et al.  Tunable optical switch using magnetic fluids , 2004 .

[16]  Ching-Fuh Lin,et al.  Tunable diffraction of magnetic fluid films and its potential application in coarse wavelength-division multiplexing. , 2004, Optics letters.

[17]  Matt Law,et al.  Nanoribbon Waveguides for Subwavelength Photonics Integration , 2004, Science.

[18]  Limin Tong,et al.  Modeling of silica nanowires for optical sensing. , 2005, Optics express.

[19]  Xianfeng Chen,et al.  Tunable magnetic fluid grating by applying a magnetic field , 2005 .

[20]  Shengli Pu,et al.  Suppressing the thermal lens effect by magnetic-field-induced mass transfer and phase separation in a magnetic fluid , 2005 .

[21]  Xianfeng Chen,et al.  Measurement of the refractive index of a magnetic fluid by the retroreflection on the fiber-optic end face , 2005 .

[22]  Limin Tong,et al.  Assembly of silica nanowires on silica aerogels for microphotonic devices. , 2005, Nano letters.

[23]  C. Hong,et al.  Designing optical-fiber modulators by using magnetic fluids. , 2005, Optics letters.

[24]  Shieh-Yueh Yang,et al.  Dynamic response of optical-fiber modulator by using magnetic fluid as a cladding layer , 2005 .

[25]  Werner Köhler,et al.  Short-time aggregation dynamics of reversible light-induced cluster formation in ferrofluids , 2005 .