Utilizing hybrid integration model.the integrated model optocouplers have successfully developed.The design,fabrication and characteristic parameters of the devices are presented.
Model GC1312S multifunction integrated optical circuit device (MIOC) used in inertial grade interferometric fiber optics gyroscopes (IFOGs) is fabricated by annealing and proton exchange process (APE). The unique feat...Model GC1312S multifunction integrated optical circuit device (MIOC) used in inertial grade interferometric fiber optics gyroscopes (IFOGs) is fabricated by annealing and proton exchange process (APE). The unique feature of the device is the incorporation of the beat detection circuit besides all the features the conventional single Y branch multifunction integrated optical circuit devices have. The device structure, operation principle and typical characteristics, etc., are briefly presented in this paper.展开更多
A theoretical model for describing the operation of an electro-optical polarization controller on LiNbO3 is presented. The model can be used to optimize the device’s structure and parameters to reach a specific polar...A theoretical model for describing the operation of an electro-optical polarization controller on LiNbO3 is presented. The model can be used to optimize the device’s structure and parameters to reach a specific polarization control. Meanwhile, some aspects on the design of an electro-optical polarization controller are described.展开更多
A special device with photocurrent amplification function is reported. The device with long base region structure consists of dual route photodetectors and their amplifier. Two photodetectors with a space of 50 μm ...A special device with photocurrent amplification function is reported. The device with long base region structure consists of dual route photodetectors and their amplifier. Two photodetectors with a space of 50 μm are precisely located in this device. The device with current sensitivity of S ≥15 A/lm,static state current transmission coefficient of h FE ≥5 000, single route dark current of I D≥1 μA, high frequency current transmission coefficient modulus of | h fe |≥1 at 400 MHz is obtained. At present, the device has been tried out in展开更多
Experimentally, the electron drag effect on carbon nanotube surface in flowing liquids was investigated. It was found that electric current could be generated in metallic carbon nanotubes immersed in the liquids. Carb...Experimentally, the electron drag effect on carbon nanotube surface in flowing liquids was investigated. It was found that electric current could be generated in metallic carbon nanotubes immersed in the liquids. Carbon nanotubes were synthesized on Si substrate by hot filament chemical vapor deposition. The experimental results showed that the flow-induced current on the surface of carbon nanotube films was closely depended on the flow rate, concentration, properties and temperature of liquids. The flow-induced current was increased with the increasing of flow rate, concentration and temperature of liquids. The obtained results were discussed in detail.展开更多
We have fabricated high speed 1.3μm InGaAsP/InP laser module with a CW 3-dB modulation bandwidth of 4 GHz under direct modulation and a threshold current less than 40 mA at room temperature.In this paper,the design,f...We have fabricated high speed 1.3μm InGaAsP/InP laser module with a CW 3-dB modulation bandwidth of 4 GHz under direct modulation and a threshold current less than 40 mA at room temperature.In this paper,the design,fabrication techniques and microwave package of module are described in detail,and the microwave and optoelectronic performances are discussed.展开更多
The design,fabrication and performance of 1.3μm superluminescent diodes are reported.A InP window structure and a passive absorber waveguide in different plane are applied to suppress lasing oscillation.A buried cres...The design,fabrication and performance of 1.3μm superluminescent diodes are reported.A InP window structure and a passive absorber waveguide in different plane are applied to suppress lasing oscillation.A buried crescent structure similar to a laser diode is introduced to achieve high output power.The output power of about 70O μW is coupled into a single-mode fiber at 150 mA and 25℃.Spectrum width is more than 30 nm.The devices operate in superluminescent state in the range from 0℃ to 60℃.展开更多
Piezoresistive effect of carbon nanotube films was investigated by athree-point bending test. Carbon nanotubes were synthesized by hot filament chemical vapordeposition. The experimental results showed that the carbon...Piezoresistive effect of carbon nanotube films was investigated by athree-point bending test. Carbon nanotubes were synthesized by hot filament chemical vapordeposition. The experimental results showed that the carbon nanotubes have a striking piezoresistiveeffect. The relative resistance was changed from 0 to 10.5 X 10^(-2) and 3. 25 X 10^(-2) for dopedand undoped films respectively at room temperature when the microstrain under stress from 0 to 500.The gauge factors for doped and undoped carbon nanotube films under 500 microstrain were about 220and 67 at room temperature, respectively, exceeding that of polycrystalline silicon (30) at 35℃.The origin of the resistance changes in the films may be attributed to a strain-induced change inthe band gap for the doped tubes and the defects for the undoped tubes.展开更多
The recent advances on the research and the applications of the integrated optics acousto-optic spectrum analyzer(IOSA) are reviewed. The operating principle, architecture, characteristics and technology, and future d...The recent advances on the research and the applications of the integrated optics acousto-optic spectrum analyzer(IOSA) are reviewed. The operating principle, architecture, characteristics and technology, and future development of the different receivers are described.展开更多
文摘Utilizing hybrid integration model.the integrated model optocouplers have successfully developed.The design,fabrication and characteristic parameters of the devices are presented.
文摘Model GC1312S multifunction integrated optical circuit device (MIOC) used in inertial grade interferometric fiber optics gyroscopes (IFOGs) is fabricated by annealing and proton exchange process (APE). The unique feature of the device is the incorporation of the beat detection circuit besides all the features the conventional single Y branch multifunction integrated optical circuit devices have. The device structure, operation principle and typical characteristics, etc., are briefly presented in this paper.
文摘A theoretical model for describing the operation of an electro-optical polarization controller on LiNbO3 is presented. The model can be used to optimize the device’s structure and parameters to reach a specific polarization control. Meanwhile, some aspects on the design of an electro-optical polarization controller are described.
文摘A special device with photocurrent amplification function is reported. The device with long base region structure consists of dual route photodetectors and their amplifier. Two photodetectors with a space of 50 μm are precisely located in this device. The device with current sensitivity of S ≥15 A/lm,static state current transmission coefficient of h FE ≥5 000, single route dark current of I D≥1 μA, high frequency current transmission coefficient modulus of | h fe |≥1 at 400 MHz is obtained. At present, the device has been tried out in
文摘Experimentally, the electron drag effect on carbon nanotube surface in flowing liquids was investigated. It was found that electric current could be generated in metallic carbon nanotubes immersed in the liquids. Carbon nanotubes were synthesized on Si substrate by hot filament chemical vapor deposition. The experimental results showed that the flow-induced current on the surface of carbon nanotube films was closely depended on the flow rate, concentration, properties and temperature of liquids. The flow-induced current was increased with the increasing of flow rate, concentration and temperature of liquids. The obtained results were discussed in detail.
文摘We have fabricated high speed 1.3μm InGaAsP/InP laser module with a CW 3-dB modulation bandwidth of 4 GHz under direct modulation and a threshold current less than 40 mA at room temperature.In this paper,the design,fabrication techniques and microwave package of module are described in detail,and the microwave and optoelectronic performances are discussed.
文摘The design,fabrication and performance of 1.3μm superluminescent diodes are reported.A InP window structure and a passive absorber waveguide in different plane are applied to suppress lasing oscillation.A buried crescent structure similar to a laser diode is introduced to achieve high output power.The output power of about 70O μW is coupled into a single-mode fiber at 150 mA and 25℃.Spectrum width is more than 30 nm.The devices operate in superluminescent state in the range from 0℃ to 60℃.
基金National Natural Science Foundation of China (60376032)
文摘Piezoresistive effect of carbon nanotube films was investigated by athree-point bending test. Carbon nanotubes were synthesized by hot filament chemical vapordeposition. The experimental results showed that the carbon nanotubes have a striking piezoresistiveeffect. The relative resistance was changed from 0 to 10.5 X 10^(-2) and 3. 25 X 10^(-2) for dopedand undoped films respectively at room temperature when the microstrain under stress from 0 to 500.The gauge factors for doped and undoped carbon nanotube films under 500 microstrain were about 220and 67 at room temperature, respectively, exceeding that of polycrystalline silicon (30) at 35℃.The origin of the resistance changes in the films may be attributed to a strain-induced change inthe band gap for the doped tubes and the defects for the undoped tubes.
文摘The recent advances on the research and the applications of the integrated optics acousto-optic spectrum analyzer(IOSA) are reviewed. The operating principle, architecture, characteristics and technology, and future development of the different receivers are described.
