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Major disadvantage are high power consumption, generation of mechanical noise due to fan cooling and limited laser powers. The most commonly integrated laser diodes , which are used for diode lasers in biophotonics are based either on GaN or GaAs semiconductor material.

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As a result, the coherence length will raise into the range of several meters, whereas the linewidth will drop well below picometers pm. Biophotonic applications, which make use of this characteristics are Raman spectroscopy requires linewidth below cm-1 and spectroscopic gas sensing.

Influence of environmental conditions in bovine bone ablation by ultrafast laser

Solid-state lasers are lasers based on solid-state gain media such as crystals or glasses doped with rare earth or transition metal ions, or semiconductor lasers. Although semiconductor lasers are of course also solid-state devices, they are often not included in the term solid-state lasers. Ion-doped solid-state lasers also sometimes called doped insulator lasers can be made in the form of bulk lasers, fiber lasers, or other types of waveguide lasers. Solid-state lasers may generate output powers between a few milliwatts and in high-power versions many kilowatts.

Many advanced applications in biophotonics require individually selectable light at multiple wavelengths. As a consequence a series of new laser technologies has been introduced, which currently looks for precise wording. The most commonly used terminology are supercontinuum lasers, which emit visible light over a wide spectrum simultaneously.

This light is then filtered e.

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Recently NKT Photonics bought Fianium, [15] remaining the major supplier of the supercontinuum technology on the market. This approach does not require AOTF's and has a background-free spectral purity. Since both concepts have major importance for biophotonics the umbrella term "ultrachrome lasers" is often used. Swept sources are designed to continuously change 'sweep' emitted light frequency in time. They typically continuously circle through a pre-defined range of frequencies e. Swept sources in the terahertz regime have been demonstrated. Vibrational spectroscopy in the terahertz THz frequency range, 0.

For more than 20 years, theoretical studies predicted multiple resonances in absorption or transmission spectra of biological molecules in this range. THz radiation interacts with the low- frequency internal molecular vibrations by exciting these vibrations. Single photon sources are novel types of light sources distinct from coherent light sources lasers and thermal light sources such as incandescent light bulbs and mercury-vapor lamps that emit light as single particles or photons.

From Wikipedia, the free encyclopedia. For the spontaneous low-level emission of photons from living tissues, see Biophoton. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. This section does not cite any sources.

Optical Systems in Ultrafast Biophotonics

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Ultrafast Biophotonics - eBook -

July SPIE Newsroom. International Society for Optics and Photonics: Journal of Biophotonics. Retrieved Archived from the original on February Pierre Laporte 1 AuthorId : Author. Hide details. Abstract : In the field of biophotonics the main goals are the control and processing of in vivo biological tissues and the monitoring of biomolecule dynamics.

Two particular pitfalls are present: the dynamic multiscale organization and the photostress of the medium. Until now the state of the art of the pico-femtosecond systems designed to these applications shows that the changing laser technology has been only used as an add-on.

Our approach is based on a bottom-up procedure and on the medium-centered knowledge.

The range of neurobiological applications of ultrafast photonics extends from TRP time-resolved propagation to linear and non-linear TRE time-resolved emission. Share full text access.

Biophotonics poised to make major breakthroughs in medicine - Science Nation

Please review our Terms and Conditions of Use and check box below to share full-text version of article. Abstract Ultrafast lasers are promising tools for surgical applications requiring precise tissue cutting. Volume 12 , Issue 6 June e Related Information. Close Figure Viewer.

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