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A dual purpose femtosecond laser processing and 5D spectroscopic (xyz, time, wavelength) microscopy system provides intelligent in-situ analysis and on-the-fly control of optical waveguides during laser writing. Definitive evidence of heat accumulation effects is reported.
Asymmetric directional couplers were written inside bulk borosilicate glass by a high repetition rate femtosecond laser. Wavelength-dependent coupling ratios were tuned by laser exposure and coupler geometry, yielding flattened spectral response (±5%) over ≫400-nm bandwidth.
A dual purpose femtosecond laser processing and 5D spectroscopic (xyz, time, wavelength) microscopy system provides intelligent in-situ analysis and on-the-fly control of optical waveguides during laser writing. Definitive evidence of heat accumulation effects is reported.
A dual purpose femtosecond laser processing and 5D spectroscopic (xyz, time, wavelength) microscopy system provides intelligent in-situ analysis and on-the-fly control of optical waveguides during laser writing. Definitive evidence of heat accumulation effects is reported.
Asymmetric directional couplers were written inside bulk borosilicate glass by a high repetition rate femtosecond laser. Wavelength-dependent coupling ratios were tuned by laser exposure and coupler geometry, yielding flattened spectral response (plusmn5%) over >400-nm bandwidth.
A new domain of rapid waveguide writing using 50 to 1500 fs laser pulses is presented for fused silica. Type II photosensitivity mechanisms are inferred for the low-loss waveguides, imprinted with coarsely overlapping pulses.
A femtosecond fiber laser with 1.5-MHz repetition rate was used to write directional couplers inside bulk glasses for the first time in the 1550-nm band. Waveguide losses and coupling strengths are reported for borosilicate glass.
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