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Competition between Raman and Kerr effects in microresonator comb generation
10.1364/OL.42.002786 2017-07-11 We investigate the effects of Raman and Kerr gain in crystalline microresonators and determine the conditions required to generate mode-locked frequency combs. We show theoretically that a strong, narrowband Raman gain determines a maximum microresonator size... |
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Widely wavelength tunable fast intensity-modulated light source for biophotonic applications
10.1364/OL.42.002790 2017-07-11 High modulation depth, fast (megahertz to gigahertz), intensity-modulated light sources of various wavelengths within the 0.7–1.35 μm bio-penetration window are highly desirable for many biophotonic diagnosis systems. In this Letter, we present a novel scheme... |
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Bragg grating inscription in PMMA optical fibers using 400-nm femtosecond pulses
10.1364/OL.42.002794 2017-07-11 In this Letter, we report the fast growth of high quality uniform Bragg gratings in trans-4-stilbenemethanol (TS)-doped poly(methyl methacrylate) (PMMA) step-index optical fibers. Grating manufacturing was obtained using a 400 nm femtosecond pulsed laser and ... |
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Design rules for combined label-free and fluorescence Bloch surface wave biosensors
10.1364/OL.42.002798 2017-07-11 We report on the fabrication and physical characterization of optical biosensors implementing simultaneous label-free and fluorescence detection and taking advantage of the excitation of Bloch surface waves at a photonic crystal’s truncation interface. Two ty... |
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Broadband etching-free metal grating couplers embedded in titanium dioxide waveguides
10.1364/OL.42.002778 2017-07-11 Metal grating couplers embedded into a titanium dioxide layer are proposed. A coupling efficiency better than 20% is experimentally demonstrated with a 3 dB bandwidth of 86 nm which is in agreement with simulation results. This allowed us to perform error-fre... |
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Bragg grating inscription in PMMA optical fibers using 400-nm femtosecond pulses
10.1364/OL.42.002794 2017-07-11 In this Letter, we report the fast growth of high quality uniform Bragg gratings in trans-4-stilbenemethanol (TS)-doped poly(methyl methacrylate) (PMMA) step-index optical fibers. Grating manufacturing was obtained using a 400 nm femtosecond pulsed laser and ... |
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Low photon count based digital holography for quadratic phase cryptography
10.1364/OL.42.002774 2017-07-11 Recently, the vulnerability of the linear canonical transform-based double random phase encryption system to attack has been demonstrated. To alleviate this, we present for the first time, to the best of our knowledge, a method for securing a two-dimensional ... |
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Widely wavelength tunable fast intensity-modulated light source for biophotonic applications
10.1364/OL.42.002790 2017-07-11 High modulation depth, fast (megahertz to gigahertz), intensity-modulated light sources of various wavelengths within the 0.7–1.35 μm bio-penetration window are highly desirable for many biophotonic diagnosis systems. In this Letter, we present a novel scheme... |
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Competition between Raman and Kerr effects in microresonator comb generation
10.1364/OL.42.002786 2017-07-11 We investigate the effects of Raman and Kerr gain in crystalline microresonators and determine the conditions required to generate mode-locked frequency combs. We show theoretically that a strong, narrowband Raman gain determines a maximum microresonator size... |
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Design rules for combined label-free and fluorescence Bloch surface wave biosensors
10.1364/OL.42.002798 2017-07-11 We report on the fabrication and physical characterization of optical biosensors implementing simultaneous label-free and fluorescence detection and taking advantage of the excitation of Bloch surface waves at a photonic crystal’s truncation interface. Two ty... |