Recent Achievements on Grating Fabrications in Polymer Optical Fibers with Photosensitive Dopants: A Review

Jiang, Jie; Zhang, Nan; Min, Rui; Cheng, Xin; Qu, Haiyan; Hu, Xuehao

doi:10.3390/polym14020273

Cited by 19 publications

(13 citation statements)

References 92 publications

(307 reference statements)

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“…The grating is an optical device composed of many parallel slits with equal width and spacing. [63][64][65] The grating function divides the polychromatic light. Commonly used gratings are generally made by engraving several parallel lines on a glass sheet.…”

Section: Reconfigurable Blazed Grating Plane Equipped With Srh-sammentioning

confidence: 99%

Bio‐Inspired Soft‐Rigid Hybrid Smart Artificial Muscle Based on Liquid Crystal Elastomer and Helical Metal Wire

Zhao

Tian

Liu

et al. 2023

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Undoubtedly, it is an urgent need to develop high-performance artificial muscles in robotics.Artificial muscles generally include different types of rigid and soft artificial muscles. Traditional rigid muscles usually come in two types, that is, cable-type and connecting rod-type. [10] Rigid robots based on rigid muscles are given diversified automated manufacturing assignments in the industrial and agricultural fields, having made considerable contributions to the advancement of these fields. [2,11] However, rigid muscles have poor environmental flexibility, limited degrees of freedom, and complex control due to their rigid and bulky structure. [12][13][14] Hence, soft artificial muscles with flexible shape morphing, high maneuverability, strong environmental adaptability, and low manufacturing cost have emerged. [7,15] Soft robots with soft artificial muscles as their key components have exhibited enormous application possibilities, for example, drug delivery tools, [16,17] flexible grippers, [18,19] and means of soft human-machine interaction (HMI). [20,21] Although great progress has been made on soft artificial muscles, there are still many deficiencies due to their poor bearing capacity, shock vulnerability, and difficulty in precise control. [22][23][24] Moreover, it is worth noting that both rigid and soft muscles usually lack sensing feedback, [25][26][27][28] which limits the working efficiency and reliability of robots, especially those of mobile robots and manipulation robots. Additional sensing elements increase the complexity of the entire system, sacrificing the respective functions or responsiveness and increasing the manufacturing. [29][30][31] Thus, artificial muscles cannot adequately fulfill practical engineering requirements. Consequently, developing an artificial muscle with large shape morphing, high bearing capacity, and deformation perception properties is a tremendous challenge.Actuation, load-bearing, and sensory systems are ingeniously coordinated in animals. [1] For example, human arms include muscles, bones, and sensory nerves (i.e., muscle-bone-nerve system), which combine the functions of large shape morphing, high bearing capacity, and deformation sensing monitor. [32,33] In detail, actuation units are composed of muscles that facilitate manipulation and locomotion combined with the bones. As a result, the actuation of human arms is characterized by a large range of motion and high flexibility. The

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Section: Reconfigurable Blazed Grating Plane Equipped With Srh-sammentioning

confidence: 99%

Bio‐Inspired Soft‐Rigid Hybrid Smart Artificial Muscle Based on Liquid Crystal Elastomer and Helical Metal Wire

Zhao

Tian

Liu

et al. 2023

Small

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“…A high versatility is found in OFS, since many approaches were employed throughout the years, where the intensity variation [ 37 ], fluorescence/absorbance [ 38 ], long period gratings [ 39 ], FBGs [ 14 , 40 ], non-uniform gratings [ 41 ], nonlinear effects [ 42 ], specklegrams [ 43 ], interferometers [ 44 ], and surface plasmon resonance [ 45 ] sensors are generally employed. As an important advantage of optical fiber sensing approaches (related to their material features, which include a flexibility, compactness, and chemical stability), such sensors are able of being embedded in rigid and flexible structures [ 46 ], as well as the integration in different dyes [ 47 ] and dopants [ 48 ]. The embedment or integration of different materials in OFS is especially important in humidity sensors development using silica optical fibers, since such an optical material is not intrinsically sensitive to humidity/moisture absorption [ 49 ].…”

Section: Flight Environment Sensingmentioning

confidence: 99%

Multifunctional Integration of Optical Fibers and Nanomaterials for Aircraft Systems

2023

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Smart sensing for aeronautical applications is a multidisciplinary process that involves the development of various sensor elements and advancements in the nanomaterials field. The expansion of research has fueled the development of commercial and military aircrafts in the aeronautical field. Optical technology is one of the supporting pillars for this, as well as the fact that the unique high-tech qualities of aircrafts align with sustainability criteria. In this study, a multidisciplinary investigation of airplane monitoring systems employing optical technologies based on optical fiber and nanomaterials that are incorporated into essential systems is presented. This manuscript reports the multifunctional integration of optical fibers and nanomaterials for aircraft sector discussing topics, such as airframe monitoring, flight environment sensing (from temperature and humidity to pressure sensing), sensors for navigation (such as gyroscopes and displacement or position sensors), pilot vital health monitoring, and novel nanomaterials for aerospace applications. The primary objective of this review is to provide researchers with direction and motivation to design and fabricate the future of the aeronautical industry, based on the actual state of the art of such vital technology, thereby aiding their future research.

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“…On the other hand, short gratings can produce in-line fiber devices [40,45]. Until now, the inscription technology, which is based on photosensitive polymers and laser [54], allows for producing diffraction grating in undoped POF [51,55], POF with dopants [56,57], multicore POF [58], and multimode or single mode POF (SMPOF) [59]. Many ways of tuning optical parameters give us the fabrication of mPOF [43,60] (Figure 2).…”

Section: Polymer Fiber Optic Sensorsmentioning

confidence: 99%

Temperature Sensors based on Polymer Fiber Optic Interferometer

Jędrzejewska‐Szczerska¹

2022

Preprint

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Temperature measurements are of great importance in many fields of human activities, including industry, technology, and science. For example, obtaining a certain temperature value or a sudden change in it can be the primary control marker of a chemical process. Fiber optic sensors have remarkable properties giving a broad range of applications. They enable continuous real-time temperature control in difficult-to-reach areas, in hazardous working environments (air pollution, chemical or ionizing contamination), and the presence of electromagnetic disturbances. The use of fiber optic temperature sensors in polymer technology can significantly reduce the cost of their production. Moreover, the installation process and usage would be simplified. As a result, these types of sensors would becoming increasingly popular in industrial solutions. This review provides a critical overview of the latest development of fiber optic temperature sensors based on Fabry-Perot interferometer made with polymer technology.

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Recent Achievements on Grating Fabrications in Polymer Optical Fibers with Photosensitive Dopants: A Review

Cited by 19 publications

References 92 publications

Bio‐Inspired Soft‐Rigid Hybrid Smart Artificial Muscle Based on Liquid Crystal Elastomer and Helical Metal Wire

Bio‐Inspired Soft‐Rigid Hybrid Smart Artificial Muscle Based on Liquid Crystal Elastomer and Helical Metal Wire

Multifunctional Integration of Optical Fibers and Nanomaterials for Aircraft Systems

Temperature Sensors based on Polymer Fiber Optic Interferometer

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