Abstract:
PURPOSE: A light biosensor using an optical fiber whereby a metallic nanowire is inserted, a manufacturing method thereof, and a method using the same for detecting bio substances are provided to generate surface plasmon resonance in the optical fiber by inserting a metallic nanowire inside the optical fiber and to detect the bio substances by filling inside a channel formed on the optical fiber. CONSTITUTION: A method for manufacturing a light biosensor is as follows. A first bar(30), a second bar(41), and glass bars(40) are arranged in a preset tube shaped object having a channel(42) inside. The second bar is arranged adjacent to the first bar, and the hole is arranged adjacent to the second bar. The first bar, the second bar, and the glass bars are filled inside a tube(50) and extended to the optical fiber.
Abstract:
분포형 광섬유 센서는, 서로 상이한 브릴루앙 천이 주파수를 가지며 서로 동일한 길이를 갖고 서로 광학적으로 연결된 복수 개의 광섬유를 포함하는 시험 광섬유; 미리 설정된 주파수로 변조된 세기를 갖는 광을 출력하는 광원부; 상기 광원부로부터의 광을 이용하여 제1 광신호 및 제2 광신호를 상기 시험 광섬유의 양단에 각각 인가하는 광변조부; 및 상기 시험 광섬유에서 상기 제1 광신호 및 상기 제2 광신호에 의하여 생성된 브릴루앙(Brillouin) 산란광을 검출하는 광검출부를 포함할 수 있다. 브릴루앙 산란을 이용한 센싱 방법은, 미리 설정된 주파수로 변조된 세기를 갖는 광을 출력하는 단계; 출력된 광을 제1 광신호 및 제2 광신호로 분기하는 단계; 서로 상이한 브릴루앙 천이 주파수를 가지며 서로 동일한 길이를 갖고 서로 광학적으로 연결된 복수 개의 광섬유를 포함하는 시험 광섬유의 양단에 각각 상기 제1 광신호 및 상기 제2 광신호를 인가하는 단계; 및 상기 시험 광섬유에서 상기 제1 광신호 및 상기 제2 광신호에 의하여 생성된 브릴루앙 산란광을 검출하는 단계를 포함할 수 있다.
Abstract:
PURPOSE: A bending sensor using rf signals and bend sensing method using the same are provided to be usefully used for the distributed sensor. CONSTITUTION: The optical source section(110) creates the RF optical signal. The deformable portion(140) includes the reference optical fiber lattice(150) and the sensing light fiber grating(155) reflecting the optical signal of the optical source section. The optical fiber spool(160) offers the dispersion according to the optical signal reflected to the reference optical fiber lattice and the optic signal wavelength reflected to the sensing light fiber grating. The optical detecting part(170) receives a message the optical signal reflected to from the optical fiber spool with the reference optical fiber lattice and the optical signal reflected to the sensing light fiber grating. The optical detecting part changes received optical signals into the electric signal.
Abstract:
A multi-wave length laser device and an oscillation method of the multi-wave length laser are provided, which obtain single mode multi-wave length laser by suppressing oscillation of the side mode. A multi-wave length laser device comprises the combination oscillator, the semiconductor optical amplifier(130), the multi-wavelength filter(140), and the variable opto-coupler(180). The combination oscillator comprises the first resonator(110) and the connected second resonator(120). The combination oscillator reduces the optical signal of the side mode by oscillating the optical signal in the set frequency. The semiconductor optical amplifier produces the laser light signal. The multi-wavelength filter authorizes the optical signal generated by the semiconductor optical amplifier to the first resonator.
Abstract:
A reconfigurable bidirectional optical branching/combining multiplexer is provided to use one AWG(Arrayed Waveguide Grating) only and to use a foldback path, thus a configuration is simple and economical while influence of crosstalk is minimized and desired channels are branched or combined. Optical signals are outputted to the third port by being inputted to the second port of an inputted optical circulator(320). The outputted optical signals are demultiplexed by wavelength in an AWG(310) by passing through an input demultiplexing port(311) of the AWG connected with the third port of the optical circulator, and are outputted to N output demultiplexing ports. Optical signals inputted to second port of optical circulators(330,340,350,360) are outputted to the third port and inputted to optical switches(335,345,365) connected one to one at every interval of the respective optical circulators.
Abstract:
할로우 코어(hollow core)를 갖는 광섬유를 이용한 기체 검출 장치 및 방법이 개시된다. 기체 검출 장치는, 기체가 주입될 수 있는 코어를 포함하는 광섬유; 광섬유의 한쪽 끝을 통하여 광섬유의 코어 내로 빛을 입사시키는 광원; 및 광섬유의 다른쪽 끝으로부터 반사된 빛을 광섬유의 한쪽 끝을 통하여 검출하며, 반사된 빛을 이용하여 광섬유의 코어 내의 기체를 검출하는 검출부를 포함할 수 있다. 기체 검출 방법은, 광섬유의 한쪽 끝을 통하여 광섬유의 코어 내로 빛을 입사시키는 단계; 입사된 빛을 광섬유의 다른쪽 끝에서 반사시키는 단계; 반사된 빛을 광섬유의 한쪽 끝을 통하여 검출하는 단계; 및 반사된 빛을 이용하여 광섬유의 코어 내의 기체를 검출하는 단계를 포함할 수 있다.
Abstract:
PURPOSE: A distribution type optical fiber sensor and a method for controlling beat noise of the distribution type optical fiber sensor are provided to measure physical changes and the temperature of a large building, a bridge, an aircraft, and a railway vehicle by using a brillouin optical correlation domain analysis. CONSTITUTION: A distribution type optical fiber sensor comprises a test optical fiber(30), a light source unit(10), a light modulation unit(20), and an optical detecting unit(50). The light source unit outputs lights modulated into a first frequency. The light modulation unit generates first optical signals including sideband signals and second optical signals chirped into a second frequency having a preset ratio with respect to the first frequency by utilizing the light emitted by the light source unit and applies the first and second optical signals respectively to both ends of the test optical fiber. The optical detecting unit detects brillouin scattered light generated by the first and second optical signals from the test optical fiber. [Reference numerals] (210) Light distributor; (225) Signal generator; (530) Phase lock amplifier; (AA) Probe; (BB) Pump