This paper combines the characteristics of optoelectronic technology with that of bilingual teaching. The course pays attention to integrating theory with practice, and cultivating learners' ability. Reform and exploration have been done in the fields of teaching materials, teaching content, teaching methods, etc. The concrete content mainly includes five parts: selecting teaching materials, establishing teaching syllabus, choosing suitable teaching method, making multimedia courseware and improving the test system, which can arouse students’ interest in their study and their autonomous learning ability to provide beneficial references for improving the quality of talents of optoelectronic bilingual courses.
We propose and demonstrate a novel fiber surface plasmon resonance (SPR) sensor based on a twin-core fiber (TCF). We grind the TCF tip into a frustum wedge shape, and plate a 50nm sensing gold film on the end face, two 500nm reflected gold films on the side faces of the wedge. We launch light source into the core of the TCF by using the high accuracy three-dimensional adjusting mount and microscope objective system. This SPR probe can be combined with microfluidic chip, and realize the real-time monitoring of the refractive index (RI) sensing of flow liquid in the microfluidic channel. The probe successfully monitors the refractive index of liquid ranged from 1.33 to 1.37 and the average sensitivity reaches to 5213nm/RIU in the solution.
We propose a novel method to gather or arrange multiple micro particles by using the thermal convection effect in the water. We fabricate the fiber tip to be a nonadiabatic-tapered shape and then plate a gold film on the fiber tip. The gold film coated on the fiber tip absorbs the light output from the fiber and then generate lots of heat in the water, which causes the thermal convection. The convection forces bring the micro particles moving towards the fiber tip where the temperature is much higher. By using this thermal convection effect, we can realize the multiple micro particles gathering or arranging quickly, easily and simply.
A novel hybrid Michelson-FP (M-FP) interference fiber sensor based on a twin-core fiber has been proposed. It consists
of an in-fiber integrated Michelson interferometer and an air FP cavities. The radial strain and axial strain sensing
properties are explored and analyzed. By using this novel structure, we can measure radial strain and axial strain
We propose and demonstrate a transverse self-accelerating Bessel-like beam generator based on a graded index multimode optical fiber(GIF). The single-mode fiber and the graded-index multimode fiber are spliced with a defined offset. The offset Δx and the GIF length L affect the final properties of the Bessel-like beam, here we choose the offset Δx=20μm and the GIF length L=430μm to be optimal. The beam accelerates along the designed parabolic path up to 250μm in <i>z</i> direction and 40μm in x direction, the curvature of bending is 16% (40μm/250μm, <i>x/z</i>). This transverse self-accelerating Bessel-like beam generator based on the graded index multimode optical fiber constitutes a new development for high-precision micro particles experiments and manipulations because of its simple structure, high integration and small size.
We present and demonstrate a novel single fiber optical tweezers which can trap and launch (clean) a target polystyrene (PS) microsphere (diameter~10μm) with independent control by using two wavelengths beams: 980nm and 1480nm. We employ 980nm laser beam to trap the target PS microsphere by molding the fiber tip into a special tapered-shape; and we employ 1480nm laser beam to launch the trapped PS microsphere with a certain velocity by using the thermophoresis force generated from the thermal effect due to the high absorption of the 1480nm laser beams in water. When the launching force is smaller than the trapping force, the PS microsphere will be trapped near the fiber tip, and the launching force will blow away other PS microspheres in the workspace realizing the cleaning function; When the launching force is larger than the trapping force, the trapped PS microsphere will be launched away from the fiber tip with a certain velocity and towards a certain direction, realizing the launching function. This PS microsphere launching and cleaning functions expanded new features of single fiber optical tweezers, providing for the possibility of more practical applications in the micro manipulation research fields.
We propose and demonstrate a mode division multiplexing single fiber optical tweezers. By using this tweezers, one can trap a yeast cell and then launch it away from the fiber tip with a certain speed to a certain position without moving the optical fiber in a single fiber optical trapping apparatus. We excite both LP<sub>01</sub> and LP<sub>11</sub> mode beams in a same normal communication fiber core to generate the optical launching force and trapping force by molding the fiber tip into a special tapered-tip shape. A yeast cell of 6μm diameter is trapped and then being launched away. We construct the optical trapping and launching potential wells by controlling the power of two mode beams. This micro particle directional launching function expands new features of fiber optical tweezers based on the normal communication fiber, providing for the possibility of more practical applications in the biomedical research fields.
We present a novel liquid viscosity measuring approach based on the optical trapping technology. We put a “test-micro-particle” enclosed in a confined space built by a quartz capillary tube and two opposite-inserted optical fibers to construct the test cell. In order to make the test cell have the ability of auto-ready and easy-reset, we design and fabricate a special notch-shape in the ends of two fibers. This novel approach provides a new probably development direction for the optical tweezers technology applying on the sensing and measuring fields, and solve the optical tweezers measurement repeatability problems.
We report an in-fiber integrated chemiluminiscence sensor based on a kind of hollow optical fiber with a suspended
inner core. The path of mircofluid is realized by etching microholes for inlets and outlets on the surface of the optical
fiber without damaging the inner core and then constructing a melted point beside the microhole of the outlet. By
injecting samples into the fiber, the liquids can be fully mixed and form steady microflows. Simultaneously, the photon
emitted from the chemiluminiscence reaction is efficiently coupled into the core and can be detected at the end of the
We report and demonstrate a new type of fiber wavelength division multiplexer based on central-circular cocentric core
fiber. Using splicing technique to connect the central-circular cocentric core fiber and single mode fiber, then, tapering at
the fusion point of two fibers. The light source whose wavelengths are 980nm and 1480nm input from the single mode
fiber, then two wavelengths transferred separate well at the tapering area of the cocentric fiber. The simulation results are
agreement with the theoretical analysis of the theoretical model.