Reference Arm

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 18558 Experts worldwide ranked by ideXlab platform

Hideki Kawakatsu - One of the best experts on this subject based on the ideXlab platform.

Ari T. Friberg - One of the best experts on this subject based on the ideXlab platform.

  • Temporal ghost imaging with classical non-stationary pulsed light
    Journal of the Optical Society of America B, 2010
    Co-Authors: Tomohiro Shirai, Tero Setälä, Ari T. Friberg
    Abstract:

    Temporal ghost imaging with classical pulses is described as a temporal counterpart of conventional ghost imaging with thermal light. A temporal object to be imaged is located in the test Arm, while the Reference Arm consists of some simple temporal optical elements. It is shown by illustrative examples that, when a certain condition is satisfied, the correlation between intensity fluctuations in these two Arms gives basically the squared modulus of the object, but it is generally distorted by the effect of the incident pulse. The resultant temporal image depends only on the single temporal variable in the Reference Arm, although the light in this Arm never interacts with the object. Potential applications of this system are briefly discussed.

  • Some features of temporal ghost imaging with classical light
    2010 9th Euro-American Workshop on Information Optics, 2010
    Co-Authors: Tomohiro Shirai, Tero Setälä, Ari T. Friberg
    Abstract:

    Temporal ghost imaging with classical pulsed light is described as a temporal counterpart of conventional ghost imaging with thermal light. A temporal object to be imaged is located in the test Arm while the Reference Arm consists of some simple temporal optical elements. The incident light is assumed to be temporally incoherent, classical pulsed light. We first show that the correlation between intensity fluctuations in these two Arms is given by a fractional Fourier transform of the temporal object. In special cases, the fractional Fourier transform reduces to the ordinary Fourier transform and the image of the object. We then derive explicit expressions for the resultant ghost image under two different conditions, with a view to examining the effect of the incident pulse. As a result, it is found that the resultant temporal ghost image depends only on the single temporal variable in the Reference Arm though the light in this Arm never interacts with the object, and that it is generally distorted by the effect of the incident pulse.

Christophe Gorecki - One of the best experts on this subject based on the ideXlab platform.

Roel Baets - One of the best experts on this subject based on the ideXlab platform.

  • Photonic integrated Mach-Zehnder interferometer with an on-chip Reference Arm for optical coherence tomography
    Biomedical optics express, 2014
    Co-Authors: Gunay Yurtsever, Boris Považay, Aneesh Alex, Behrooz Zabihian, Wolfgang Drexler, Roel Baets
    Abstract:

    Optical coherence tomography (OCT) is a noninvasive, three-dimensional imaging modality with several medical and industrial applications. Integrated photonics has the potential to enable mass production of OCT devices to significantly reduce size and cost, which can increase its use in established fields as well as enable new applications. Using silicon nitride (Si3N4) and silicon dioxide (SiO2) waveguides, we fabricated an integrated interferometer for spectrometer-based OCT. The integrated photonic circuit consists of four splitters and a 190 mm long Reference Arm with a foot-print of only 10 × 33 mm2. It is used as the core of a spectral domain OCT system consisting of a superluminescent diode centered at 1320 nm with 100 nm bandwidth, a spectrometer with 1024 channels, and an x-y scanner. The sensitivity of the system was measured at 0.25 mm depth to be 65 dB with 0.1 mW on the sample. Using the system, we imaged human skin in vivo. With further optimization in design and fabrication technology, Si3N4/SiO2 waveguides have a potential to serve as a platform for passive photonic integrated circuits for OCT.

Mario Giardini - One of the best experts on this subject based on the ideXlab platform.

  • tissue surface as the Reference Arm in fourier domain optical coherence tomography
    Journal of Biomedical Optics, 2012
    Co-Authors: Nikola Krstajic, C T A Brown, Kishan Dholakia, Mario Giardini
    Abstract:

    We present a simple method applicable to common-path Fourier domain optical coherence tomography (OCT) in which the tissue surface is used as the Reference Arm. We propose using aluminium hydroxide powder as a potential tissue surface diffuser to allow wider application of this method. This technique allows one to avoid pla- cing a Reference Arm reflective element, such as glass plate, on tissue, and intrinsically avoids both coherent and complex conjugate mirror artifacts associated with glass plates. Aluminium hydroxide can be sprayed onto tissue using spray nozzles commonly found in endoscopes. The sensitivity of the tissue Reference Arm common-path OCT image is 94 dB for a 50-μs charge-coupled device integration time, and 97.5 dB for a 200-μs CCD integration time.