Photoacoustics with coherent light

Photoacoustics with coherent light.

Since its introduction in the mid-nineties, photoacoustic imaging of biological tissue has been one of the fastest growing biomedical imaging modality, and its basic principles are now considered as well established. In particular, light propagation in photoacoustic imaging is generally considered from the perspective of transport theory. However, recent breakthroughs in optics have shown that ...

Photoacoustic Imaging with Coherent Light

time pressure 2 s R T c  0. 2 P R P r  • Optical detection with a Fabry-Perot • Light wavelength : 670 nm • Ultrasound frequency : 0 ─ 20 MHz • Imaging depth : ~ 6 mm • Resolution : ~ 100 µm • Acquisition time : ~ 15 min Examples of applications: vascularization imaging

Holography with Non-coherent Light

A new technique of making holograms with non-coherent light has been demonstrated using continuousspectrum white light zirconium arc source. Such a technique, employing diffraction gratings as beam splitters and beam deflectors, allows easy control of the modulation transfer function so as to produce low-pas s . band-pass or high-pass characteristics by simply changing the position of either on...

Tailored Anderson localization with partially coherent light

Anderson localization and partially coherent light are at first sight unrelated, if one thinks in terms of interference. However, Anderson localization can be observed with non-coherent light, since a partially coherent beam can be viewed as a superposition of randomly phased components, which localize independently in a disordered media [1]. This gives rise to the question of how much transver...

Optical Communication with Weak Coherent Light Fields