6533b82dfe1ef96bd1291168
RESEARCH PRODUCT
All-Optical Tuning of WGMs in Microspheres Made of Er/Yb Codoped Optical Fiber
Miguel V. AndrésJose L. CruzI. L. VillegasAntonio Diezsubject
Optical fiberMaterials scienceDopantbusiness.industryWaveguide (optics)Atomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsIonlaw.inventionCore (optical fiber)WavelengthlawOptoelectronicsElectrical and Electronic EngineeringPhotonicsbusinessAbsorption (electromagnetic radiation)description
All-optical, pump-assisted, thermal tuning of high-Q whispering-gallery mode (WGM) resonances of microspheres is demonstrated. The microspheres were made of an Er/Yb codoped single-mode silica optical fiber. The pump light absorbed by the active ions heats the microsphere, which leads to the shift of the resonances. A tuning range in excess of 2 nm in the C-band is achieved. The presence of active ions is restricted to the core of the microsphere. The WGM fields, which are confined in a region close to the surface of the microsphere, do not overlap with the dopant. Thus, high-Q resonances (>10 7 ) are achieved, as in pure silica microspheres, even at optical wavelengths within the absorption bands. We explored the use of the microsphere as a photonic scanning receiver for RF signals.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-08-01 | IEEE Photonics Technology Letters |