Sign in to use this feature.

Years

Between: -

Subjects

remove_circle_outline
remove_circle_outline
remove_circle_outline
remove_circle_outline
remove_circle_outline

Journals

Article Types

Countries / Regions

Search Results (3)

Search Parameters:
Keywords = mode field adaptor

Order results
Result details
Results per page
Select all
Export citation of selected articles as:
12 pages, 3174 KB  
Article
Optical Projection Tomography Using a Commercial Microfluidic System
by Wenhao Du, Cheng Fei, Junliang Liu, Yongfu Li, Zhaojun Liu, Xian Zhao and Jiaxiong Fang
Micromachines 2020, 11(3), 293; https://doi.org/10.3390/mi11030293 - 11 Mar 2020
Cited by 7 | Viewed by 3694
Abstract
Optical projection tomography (OPT) is the direct optical equivalent of X-ray computed tomography (CT). To obtain a larger depth of field, traditional OPT usually decreases the numerical aperture (NA) of the objective lens to decrease the resolution of the image. So, there is [...] Read more.
Optical projection tomography (OPT) is the direct optical equivalent of X-ray computed tomography (CT). To obtain a larger depth of field, traditional OPT usually decreases the numerical aperture (NA) of the objective lens to decrease the resolution of the image. So, there is a trade-off between sample size and resolution. Commercial microfluidic systems can observe a sample in flow mode. In this paper, an OPT instrument is constructed to observe samples. The OPT instrument is combined with commercial microfluidic systems to obtain a three-dimensional and time (3D + T)/four-dimensional (4D) video of the sample. “Focal plane scanning” is also used to increase the images’ depth of field. A series of two-dimensional (2D) images in different focal planes was observed and compared with images simulated using our program. Our work dynamically monitors 3D OPT images. Commercial microfluidic systems simulate blood flow, which has potential application in blood monitoring and intelligent drug delivery platforms. We design an OPT adaptor to perform OPT on a commercial wide-field inverted microscope (Olympusix81). Images in different focal planes are observed and analyzed. Using a commercial microfluidic system, a video is also acquired to record motion pictures of samples at different flow rates. To our knowledge, this is the first time an OPT setup has been combined with a microfluidic system. Full article
(This article belongs to the Special Issue Nano-Bio Optical Devices and Applications)
Show Figures

Figure 1

17 pages, 2564 KB  
Review
High-Power Passive Fiber Components for All-Fiber Lasers and Amplifiers Application—Design and Fabrication
by Dorota Stachowiak
Photonics 2018, 5(4), 38; https://doi.org/10.3390/photonics5040038 - 18 Oct 2018
Cited by 50 | Viewed by 13736
Abstract
The most important components for application in high-power all-fiber lasers and amplifiers are, most of all, power combiners, but also mode field adaptors. This paper summarizes recent achievements in the area of development and fabrication of high-power passive fiber components. The principles of [...] Read more.
The most important components for application in high-power all-fiber lasers and amplifiers are, most of all, power combiners, but also mode field adaptors. This paper summarizes recent achievements in the area of development and fabrication of high-power passive fiber components. The principles of operation and basic design and fabrication criteria, which have to be taken into account while designing the aforementioned components, are explained in detail. The most recent impressive achievements are summarized and described. Full article
(This article belongs to the Special Issue Fiber Lasers)
Show Figures

Figure 1

11 pages, 3193 KB  
Article
40 W All-Fiber Er/Yb MOPA System Using Self-Fabricated High-Power Passive Fiber Components
by Pawel Kaczmarek, Dorota Stachowiak and Krzysztof M. Abramski
Appl. Sci. 2018, 8(6), 869; https://doi.org/10.3390/app8060869 - 25 May 2018
Cited by 14 | Viewed by 7453
Abstract
In this work, we demonstrate a three-stage all-fiber master oscillator power amplifier (MOPA) system emitting over 40 W of continuous-wave (CW) output power at ~1.5 µm. The setup utilizes three self-fabricated high-power passive fiber components: a mode-field adaptor (MFA) and two types of [...] Read more.
In this work, we demonstrate a three-stage all-fiber master oscillator power amplifier (MOPA) system emitting over 40 W of continuous-wave (CW) output power at ~1.5 µm. The setup utilizes three self-fabricated high-power passive fiber components: a mode-field adaptor (MFA) and two types of pump and signal power combiners. Their development allowed us to become independent from commercially available components, which are often incompatible with fibers used in the experimental setups, resulting in additional losses. A power combiner with single-mode (SM) signal fibers in a configuration (5 + 1) × 1 was used in the second stage of the MOPA system, which was based on an SM Er–Yb co-doped double-clad (DC) fiber. The fabricated MFA was used to connect the second amplifier stage based on SM fibers with the third amplifier stage based on large-mode-area (LMA) fibers. In the third stage of MOPA system, based on Er–Yb LMA DC fibers, we used the fabricated power combiner based on LMA-type signal fibers in a configuration (6 + 1) × 1. The presented three-stage MOPA system, utilizing self-fabricated high-power passive fiber components, enables amplification of an input signal of 10 mW up to 44 W of the CW power at the wavelengths of 1555 nm and 1563 nm, corresponding to a gain level of approximately 36.4 dB. Full article
(This article belongs to the Special Issue Rare-Earth Doping for Optical Applications)
Show Figures

Figure 1

Back to TopTop