In this paper, we present a novel surface reconstruction algorithm leveraging curvatures and lengths between discrete points. By integrating this algorithm with a shape sensing system, we achieve high-speed measurement of wing shapes. The simulation and experimental results clearly demonstrate the effectiveness of our proposed algorithm in restoring preset curves. The average relative error is found to be at a remarkable level of 10 -2 , while the average running time remains at an impressive level of 10 -2 s. Additionally, through static and dynamic shape perception performed by the shape sensing system, we observe a relative error of 4.85% when subjecting the simulated wing to uniform tension, and a relative error of 3.1% under twisted tension conditions. These findings confirm the capability of our experimental device to accomplish rapid morphological monitoring at an impressive frequency of 505 kHz.
We propose a multi-layer filter architecture for compensating and monitoring impairments in transceiver, as well as polarization mode dispersion (PMD) during transmission. Through simulation, we demonstrate that our adaptive ML filter effectively compensates for impairments in Tx, Rx, and DGD while enabling their monitoring.
In this paper, we propose a dual polarization dual mode 3dB beam splitter. By utilizing the shallow etched multimode interference (MMI) coupler, the proposed device can handle TE 0 , TE 1 , TM 0 and TM 1 modes simultaneously.
Cisplatin, one of the most widely used clinical medications in the field of cancer chemotherapy, which is an indispensable drug type in traditional chemotherapy. Due to the significant toxicity and side effects of typical chemotherapy medications, precise drug concentration monitoring becomes the key. However, because of individual variances, various individuals’ metabolic capacities to medications vary, resulting in differences in actual blood drug concentration in the body under the same dosage. Therefore, it is imperative to create a new low-cost and rapid detection method for the concentration of serum active cisplatin, which is crucial to the chemotherapy effect and quality of life for cancer patients. In this work, based on the chemically cross-linked reaction between active cisplatin and DNA bases, as well as the high sensitivity of Fluorescence Resonance Energy Transfer (FRET), we proposed a new FRET-based method for detecting serum active cisplatin concentration. We constructed a fluorescent molecular probe with a dumbbell shape consisting of graphene quantum dots (GQDs) modified with carboxyl, gold nanoparticles (AuNPs), and a single-stranded DNA (ssDNA) sequence. The results reveal that the molecular probe has a strong linear correlation across the active cisplatin concentration range of 52-832 µM. This method can accomplish low-cost, rapid and simple detection of active cisplatin concentration, and further advancements in this work can give a decision-making basis for tailored and accurate cancer treatment.
Ultrafast laser is an ideal playground for the study of precise spectroscopy and microscopy that heavily rely on the high-performance optical frequency combs, which is the unique nature of mode-locked fiber lasers. In particular, dual-comb fiber lasers can greatly improve system performance while reducing complexity by developing self-referencing combs and coupling pulse trains with different repetition rates. Whereas the repetition rate is generally determined for a certain lasing resonator, which creates additional constraints in dual-comb applications. Here, we developed a bidirectional polarization-maintaining fiber laser, where the repetition rate of mode-locked pulse trains can be tuned continuously inside the cavity. The proposed laser outputs mutually orthogonal polarization states in opposite directions, and the maximum tuning range of the repetition rate reaches 681.6 kHz. Compared with referencing CW loop, the RF difference reaches 978.2 kHz, almost equal to 1 MHz. Meanwhile, the two directions generate pulses with nearly the same central wavelength, enabling excellent capacity in self-referencing dual-comb generation. This tunable-repetition-rate dual-comb source is promising for two-photon fluorescence microscopy, precise metrology of wavelength and synchronization of other combs based on fiber lasers with different repetition rate, etc.
