| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 739418 | Optics & Laser Technology | 2014 | 5 Pages |
•The guiding properties of Nd:YAG cladding waveguides at 4 μm were reported.•The refractive index profiles of Nd:YAG cladding waveguide were simulated roughly.•The cladding waveguide possesses the relatively low propagation losses.
We report on tubular cladding optical waveguides fabricated in neodymium doped yttrium aluminum garnet (Nd:YAG) crystal by ultrafast laser inscription. The structure can support guidance at the wavelength of 4 μm for the TE and TM polarizations. The refractive index contrasts of the cladding waveguides for the two transverse polarizations were estimated to be ΔnTE≈−7.5×10−3 and ΔnTM≈−6.5×10−3. The propagation losses of the cladding waveguides at the wavelength of 4 μm were determined to be as low as ~0.7 dB/cm for the TE polarization and ~1.0 dB/cm for the TM polarization.
