Results 11 to 20 of about 7,974,201 (245)

Longitudinal-torsional complex-mode ultrasonic actuator for vibration-assisted drilling of CFRP

open access: yes, 2023
Carbon-fiber-reinforced plastic (CFRP) composites are intensively used in aircraft and aerospace industry thanks to their superior properties. Comparing to the conventional drilling (CD), vibration-assisted drilling (VAD) is a novel machining technique ...
Xiaoxue Wang (311457)   +2 more
core   +7 more sources

Broadband single-mode microfiber coupler for OCT [PDF]

open access: yes, 2009
We present a bi-conical microfiber coupler (MFC) with a specifically designed transition region as an efficient tool to filter higher-order modes in multimode waveguides.
Jung, Y.   +2 more
core   +2 more sources

Single-mode tunable laser emission in the single-exciton regime from colloidal nanocrystals [PDF]

open access: yes, 2013
Whispering-gallery-mode resonators have been extensively used in conjunction with different materials for the development of a variety of photonic devices.
Brambilla, Gilberto   +7 more
core   +1 more source

Single mode interband cascade lasers based on lateral metal gratings [PDF]

open access: yes, 2014
The authors are grateful to the European Union for financial support of this work within the FP7 project “WideLase” (No. 318798).Single mode distributed feedback (DFB) interband cascade lasers were realized by placing metal gratings laterally to dry ...
Koeth, Johannes   +9 more
core   +1 more source

Longitudinal effects of social background on educational and occupational pathways within early and strong school tracking [PDF]

open access: yes, 2013
peer reviewedTransitions from education to work are subject to person-related factors and institutional opportunity structures. Life course research increasingly focuses on longitudinal effects of social background on educational and occupational ...
Bergman, Manfred Max   +2 more
core   +2 more sources

High power cladding-pumped Raman fiber laser with true single-mode output at 1660 nm

open access: yes, 2006
We report a 10 W continuous-wave cladding-pump Raman fiber laser with single-mode output at 1660 nm pumped by a high-power Er:Yb fiber amplifier. The laser threshold was 6.5 W and its slope efficiency was 67%
Jeong, Y.   +11 more
core   +2 more sources

Single-mode fiber length for wavefront filtering

open access: yes, 2008
Stellar nulling interferometry offers the possibility of direct imaging of extrasolar planets necessary for the detection of extra-terrestrial life. Achieving optimum performance from the interferometers requires that the wavefronts of light reaching the
Dasgupta, Sonali   +2 more
core   +2 more sources

Strain sensor based on gourd-shaped single-mode-multimode-single-mode hybrid optical fibre structure [PDF]

open access: yes, 2017
A fibre-optic strain sensor based on a gourd-shaped joint multimode fibre (MMF) sandwiched between two single-mode fibres (SMFs) is described both theoretically and experimentally.
Haidong Liang   +24 more
core   +1 more source

Tunable Single-Longitudinal-Mode High-Power Fiber Laser

open access: yes, 2012
We report a novel CW tunable high-power single-longitudinal-mode fiber laser with a linewidth of ∼9 MHz. A tunable fiber Bragg grating provided wavelength selection over a 10 nm range. An all-fiber Fabry-Perot filter was used to increase the longitudinal
Gautam Das, Jonas K. Valiunas
core   +1 more source

Wavelength-tunable single longitudinal mode fiber optical parametric oscillator

open access: yes, 2017
We demonstrate a ring cavity single longitudinal mode fiber optical parametric oscillator using a passive sub-ring cavity and an unpumped erbium doped fiber configured with an external fiber mirror for single mode selection.
Lim, L. T.   +5 more
core   +1 more source

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