Ti:sapphire planar waveguide coherent broadband emitter

Summary form only given. In recent years, broadband fiber interferometers have become very popular as basic instruments used in optical coherence tomography (OCT) for imaging applications in the biomedical field. A major challenge in the further development and applicability of OCT has been the improvement of both its spatial resolution and dynamic range. The longitudinal resolution is inversely proportional to the optical bandwidth of the light source. Broadband luminescence from transition-metal-ion doped materials, (e.g., Ti:sapphire) can significantly improve the longitudinal resolution compared to superluminescent diodes (~30 nm FWHM), but the low brightness of its luminescence is insufficient for achieving a useful dynamic range in OCT. Femtosecond lasers have, therefore, been used as large-bandwidth high-brightness light sources, and subcellular imaging has recently been demonstrated in this way. However, current femtosecond light sources do not necessarily meet the requirements of compactness, ease of use, and low cost. We present a simple broadband light source based on a Ti:sapphire planar waveguide. It operates in a wavelength region near 800 nm, applicable to the investigation of biotissue and detectable with simple silicon diodes, with a bandwidth comparable to that of a femtosecond light source

Presented at:
Lasers and Electro-Optics, 2001. CLEO '01, Washington, DC, USA, 11 May 2001
Opt. Soc. America
Centre of Optoelectron. Res., Southampton Univ., UK 7204060 Ti:sapphire planar waveguide coherent broadband emitter Ti:sapphire planar waveguide broadband fiber interferometers coherent broadband emitter optical coherence tomography imaging applications biomedical field spatial resolution dynamic range longitudinal resolution optical bandwidth light source broadband luminescence transition-metal-ion doped materials superluminescent diodes FWHM brightness luminescence femtosecond lasers large-bandwidth high-brightness light sources subcellular imaging femtosecond light simple broadband light source wavelength region biotissue simple Si diodes bandwidth femtosecond light source output powers 800 nm Al2O3:Ti

 Record created 2009-01-20, last modified 2018-01-28

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