Fully vectorial laser resonator modeling of continuous-wave solid-state lasers including rate equations, thermal lensing and stress-induced birefringence

Asoubar, Daniel; Wyrowski, Frank

doi:10.1364/oe.23.018802

Cited by 6 publications

(1 citation statement)

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“…To investigate the polarization effect on TaNbO5 waveguides, semi-vectorial and fullvectorial polarization [40,41] modes were employed and compared with cases where polarization was not considered. We explored transverse electric (TE) and transverse magnetic (TM) modes in analyzing multimode conditions.…”

Section: Polarization Effectmentioning

confidence: 99%

Elevating NIR Photonic Integration with Tantalum-Niobium Pentoxide

Afsary,

Uddin,

Islam

et al. 2023

Preprint

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Exploiting innovative and adaptable material platforms in integrated photonics is a cornerstone for the future of photonic integrated circuits. This research marks a pioneering effort in introducing a low-loss material platform founded on tantalum-niobium pentoxide (TaNbO5), a material endowed with remarkable attributes catering to linear and nonlinear optics applications across a broad range of near-infrared wavelengths. The TaNbO5 unit cell analysis yielded key lattice parameters, with a=12.590, b=5.828, c=7.289, and an associated direct band gap value of 2.268 eV. Specifically, at a wavelength of 1550 nm, TaNbO5 demonstrates a refractive index of 2.22, an extinction coefficient of 5.24×10-4, a reflectance value of 0.14, an absorption coefficient of 0.68 cm-1, and a photoconductivity coefficient of 2.25×10-5. Furthermore, our investigation determined a 0.8 μm cutoff core width for single-mode TaNbO5 waveguides. Most notably, these waveguides exhibit exceptional efficiencies, surpassing 99% for single-mode configurations and 98% for multimode structures. In particular, when coupled with various conventional waveguides, the TaNbO5 waveguide exhibits transmission, registering at -0.790 dB when integrated with the Si waveguide, -0.228 dB when interfacing with the Si3N4 waveguide, and -0.059 dB when combined with the LiNbO3 waveguide for single-mode coupling. For multimode coupling, the losses amount to -0.115 dB, -0.301 dB, and -0.181 dB, respectively, for the Si, Si3N4, and LiNbO3 waveguides. Notably, at a wavelength of 1.55 μm, the single-mode square waveguide demonstrates an excess loss of 0.033 dB. In contrast, the single-mode multimode waveguide exhibits a loss of 0.073 dB, and the rectangular multimode waveguide displays an excess loss of 0.327 dB. These findings underscore the significant potential and versatility of low-loss TaNbO5 waveguides for many applications in near-infrared wavelengths.

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Section: Polarization Effectmentioning

confidence: 99%