Results 91 to 100 of about 318,441 (330)

Design of a Tapered Lens for Semiconductor Laser to Single-Mode Fiber Coupling

, 2004
The theoretical investigation of the coupling efficiency of a laser diode to a single mode fiber via a hemispherical lens on the tip of the tapered fiber in the presence of possible transverse offset and angular mismatch is reported.Without the ...
Ma Yan, Xie Fuzeng
core  

Efficient low-threshold lasers based on an erbium-doped holey fiber [PDF]

, 2005
We report experimental results on the continuous-wave lasers based on a small core erbium-doped holey fiber. In a simple Fabry-Perot-type cavity with high output coupling, we demonstrate low-threshold (0.55 mW) high slope-efficiency (57.3%) operation ...
Furusawa, K., Lee, J., Richardson, D., Sahu, J., Richardson, D.J., Monro, T., Monro, T.M., Kogure, T., Sahu, J.K., Lee, J.H.   +9 more
core   +1 more source

Swelling‐Programmed Topographical Guidance for Dynamic Spheroid Self‐Assembly via a Mechanochemical Hydrogel Niche

Advanced Functional Materials, EarlyView.
A swelling‐programmed micropatterned hydrogel guides adherent cells through a controlled transition from cell–matrix anchoring to cadherin‐mediated cell–cell compaction, enabling rapid assembly of high‐viability spheroids with defined size and morphology.
Han Gyeol Nam, Seon Yeong Chae, Young Woo Kwon, Hye Jin Heo, Hye Rin Lee, Ji Hyeok Lee, Dong‐Wook Han, Yun Hak Kim, Suck Won Hong   +8 more
wiley   +1 more source

Intrinsic Photoactive Star ZnPc–Poly(glutamate) Nanoplatforms for Multimodal Glioblastoma Therapy and Brain‐Targeted Delivery

Advanced Functional Materials, EarlyView.
An intrinsic photoactive star‐shaped zinc phtalocyanine‐poly(L‐glutamic acid) (ZnPc‐PGA) nanoplatform for multimodal glioblastoma (GBM) therapy and brain‐targeted elivery. A ZnPc‐PGA‐based multifunctional theranostic nanocarrier platform enables image‐guided, multimodal GBM therapy. ZnPc‐PGA nanocarriers support the integration of fluorescence imaging,
Amina Benaicha‐Fernández, Teodora Ranđelović, Ana Armiñán, Víctor Sebastián, Manuel Fuentes, Cristián Huck‐Iriart, Esther Masiá, Paula Carrascosa‐Marco, Pablo Juanes‐Velasco, Snežana Đorđević, Clara Bayona, Ignacio Ochoa, Maria Medel, Inmaculada Conejos‐Sánchez, María J. Vicent   +14 more
wiley   +1 more source

Analysis of the Coupling Efficiency of a Dual-Fiber Spherical Coupler and Improvement of the Coupling Efficiency with a Polished Spherical Coupler

IEEE Photonics Journal, 2018
Efficient coupling of light from one waveguide to another is essential for many applications. The structural complexity of the coupler and the boundary discontinuity makes analyzing and improving the light energy coupling efficiency challenging.
Yuanzheng Chen, Jiwen Cui, Jiubin Tan
doaj   +1 more source

Efficient fiber-laser pumped Ho:LuLiF₄ laser

We present results for an efficient Ho:LuLiF4 laser in-band pumped by a cladding-pumped Tm-doped silica fiber laser. The polarized, tunable Tm-doped silica fiber-laser operates at 1938 nm, ideally suited for in-band pumping the 40 mm long weakly-doped (0.
Veronesi, S., Parisi, D., Clarkson, W.A., Tonelli, M., Kim, J.W., Mackenzie, J.I.   +5 more
core   +1 more source

Design Strategies and Emerging Applications of High‐Performance Flexible Piezoresistive Pressure Sensors

Advanced Functional Materials, EarlyView.
Flexible piezoresistive pressure sensors underpin wearable and soft electronics. This review links sensing physics, including contact resistance modulation, quantum tunneling and percolation, to unified materials/structure design. We highlight composite and graded architectures, interfacial/porous engineering, and microstructured 3D conductive networks
Feng Luo, Artur Ciesielski, Paolo Samorì   +2 more
wiley   +1 more source

The perfect waveguide coupler with universal impedance matching and transformation optics

Nanophotonics
Efficient energy transfer is crucial in electromagnetic communication. Therefore, producing a waveguide coupler that achieves broadband, nonreflective transmission is a challenging task. With the advancement of silicon-based integrated photonic circuits,
Kim Myeongjin, Park Q-Han
doaj   +1 more source

Fiber Coupling of Laser Diode Bar to Multimode Fiber Array

, 2002
A piece of multimode optical fiber with a low numerical aperture (NA) is used as an inexpensive microlens to collimate the output radiation of a laser diode bar in the high numerical aperture (NA) direction.
Xiao Jianwei, Feng Xiaoming, Ma Xiaoyu, Fang Gaozhan, Liu Bin, Zhang Jingming, Liu Yuanyuan, Wang Zhongming, Wang Xiaowei   +8 more
core  

Fundamental-mode fiber-to-fiber coupling at high-power

, 2009
Fiber-to-fiber coupling between two different fibers is a state of the art technology. Products are available on the market where multimode fibers can be coupled with very low power loss, at very high powers (multi-kilowatt).
Pålsson, M., Manneberg, Göran,, Blomqvist, M., Blomster, O.   +3 more
core   +1 more source