Single-shot measurement of stimulated Brillouin spectrum by using OFDM probe and coherent detection

2016 ◽  
Author(s):  
Jian Fang ◽  
Pengbai Xu ◽  
William Shieh
Keyword(s):  
Coherent Detection ◽  
Single Shot ◽  
Brillouin Spectrum ◽  
Stimulated Brillouin

Single-shot coherent detection of terahertz pulse with broadband spectral coverage

2009 ◽  
Vol 16 (4) ◽  
pp. 043116 ◽  
Author(s):  
Guang-yue Hu ◽  
An-le Lei ◽  
Baifei Shen ◽  
Ru-xin Li ◽  
Zhi-zhan Xu
Keyword(s):  
Coherent Detection ◽  
Single Shot ◽  
Terahertz Pulse ◽  
Spectral Coverage

Stimulated Brillouin laser-based carrier recovery in a high-Q microcavity for coherent detection

2020 ◽  
Vol 45 (14) ◽  
pp. 3848
Author(s):  
Qin Wen ◽  
Jinhui Qin ◽  
Yong Geng ◽  
Guangwei Deng ◽  
Qiang Zhou ◽  
...  
Keyword(s):  
Coherent Detection ◽  
Carrier Recovery ◽  
High Q ◽  
Stimulated Brillouin

scholarly journals System feasibility of using stimulated Brillouin scattering in self coherent detection schemes

2010 ◽  
Vol 18 (12) ◽  
pp. 12702 ◽  
Author(s):  
Luca Banchi ◽  
Marco Presi ◽  
Roberto Proietti ◽  
Ernesto Ciaramella
Keyword(s):  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Coherent Detection ◽  
Stimulated Brillouin ◽  
Detection Schemes

scholarly journals Single-shot ranging and velocimetry far beyond the coherence length of CW lasers

2021 ◽  
Author(s):  
Mustafa Bayer ◽  
Xun Li ◽  
George Guentchev ◽  
Rasul Torun ◽  
Jose E. Velazco ◽  
...  
Keyword(s):  
Coherence Length ◽  
Continuous Wave ◽  
Coherent Detection ◽  
Laser Source ◽  
Lidar Measurement ◽  
Single Shot ◽  
Detection Range ◽  
Cw Laser ◽  
Phase Variations ◽  
Frequency Sweeping

Abstract The spectral linewidth of the continuous-wave (CW) lasers is one of the key limitations on the coherent lidar systems, which defines the maximum detection range. Furthermore, precise phase or frequency sweeping requirements is a deterrent in many applications. Here, we present the Phase-Based Multi-Tone Continuous Wave (PB-MTCW) lidar measurement technique that eliminates the necessity of using high coherence laser sources as well as any form of phase or frequency sweeping while employing coherent detection. In particular, we modulate a CW laser source with multiple radio-frequency (RF) tones to generate optical sidebands. Then we utilize the relative phase variations between the sidebands that are free from laser phase noises to calculate the target distance via post-processing and triangulation algorithms. We prove that the PB-MTCW technique is capable of performing single-shot ranging and velocimetry measurements at more than 500× the coherence length of a CW laser in a benchtop experimental demonstration.

Broadening of the stimulated Brillouin spectrum in wavefront reversal

1982 ◽  
Vol 12 (7) ◽  
pp. 883-886 ◽  
Author(s):  
G B Krivoshchekov ◽  
M F Stupak ◽  
I G Kobyakov
Keyword(s):  
Brillouin Spectrum ◽  
Stimulated Brillouin

Functional stereotactic radiosurgery involving a dedicated linear accelerator and gamma unit: a comparison study

2004 ◽  
pp. 373-380 ◽  
Author(s):  
Timothy D. Solberg ◽  
Steven J. Goetsch ◽  
Michael T. Selch ◽  
William Melega ◽  
Goran Lacan ◽  
...  
Keyword(s):  
Stereotactic Radiosurgery ◽  
Linear Accelerator ◽  
Treatment Plan ◽  
Single Shot ◽  
Submillimeter Range ◽  
Primate Model ◽  
Content Type ◽  
Stereotactic Frame ◽  
Targeting Ability ◽  
Fine Print

Object. The purpose of this work was to investigate the targeting and dosimetric characteristics of a linear accelerator (LINAC) system dedicated for stereotactic radiosurgery compared with those of a commercial gamma knife (GK) unit. Methods. A phantom was rigidly affixed within a Leksell stereotactic frame and axial computerized tomography scans were obtained using an appropriate stereotactic localization device. Treatment plans were performed, film was inserted into a recessed area, and the phantom was positioned and treated according to each treatment plan. In the case of the LINAC system, four 140° arcs, spanning ± 60° of couch rotation, were used. In the case of the GK unit, all 201 sources were left unplugged. Radiation was delivered using 3- and 8-mm LINAC collimators and 4- and 8-mm collimators of the GK unit. Targeting ability was investigated independently on the dedicated LINAC by using a primate model. Measured 50% spot widths for multisource, single-shot radiation exceeded nominal values in all cases by 38 to 70% for the GK unit and 11 to 33% for the LINAC system. Measured offsets were indicative of submillimeter targeting precision on both devices. In primate studies, the appearance of an magnetic resonance imaging—enhancing lesion coincided with the intended target. Conclusions. Radiosurgery performed using the 3-mm collimator of the dedicated LINAC exhibited characteristics that compared favorably with those of a dedicated GK unit. Overall targeting accuracy in the submillimeter range can be achieved, and dose distributions with sharp falloff can be expected for both devices.

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