Showing papers by "Shuisheng Jian published in 1996"
12 Nov 1996
TL;DR: In this article, a depolarized fiber optic gyroscope with a superluminescent diode source and two depolarizers with 1.0 percent degree of polarization and one polarizer with 40dB extinction ratio were used to reduce the output bias drift and improve the scale factor stability.
Abstract: In this paper, a new type of depolarized fiber optic gyroscope is described. Sensing coil is constructed by single-mode optical fiber with 200 meters length and 70 mm wounding diameter. A superluminescent diode source is used to reduce both the coherent scattering effect and Kerr effect. Two depolarizers with 1.0 percent degree of polarization and one polarizer with 40dB extinction ratio were used to reduce the output bias drift and improve the scale factor stability. A specially designed PZT phase modulator is used to suppress the AM noise. Under laboratory environment, the zero point error of 1.5 degrees/hr over seven hours with one second time constant and 700 ppm scale factor with +/- 100 degrees/sec maximum rotating rate were achieved for this depolarized I-FOG.
2 citations
TL;DR: In this article, a technique for fabrication chirped Er3+-doped fiber gratings with etching method is reported, and an analysis is presented for the behavior of the Chirped gratings as a function of wavelength, the angle between the illuminating beams, as well as the position of the gratings.
Abstract: A technique for fabrication chirped Er3+-doped fiber gratings with etching method is reported. An analysis is presented for the behavior of the chirped gratings as a function of wavelength, the angle between the illuminating beams, as well as the position of the gratings. Experimentally, Er3+-doped fiber gratings with variable period have been etched on the D-shaped fiber. Results obtained are in good agreement with theoretical analysis.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
1 citations
TL;DR: In this article, a method of ''align axis'' in manufacturing all polarization maintaining fiber PZT phase modulator was put forward and realized on the first time, which can effectively depress the polarization noise on the output caused by the stress induced birefringence in the all PZTs phase modulators.
Abstract: In this paper, the stress induced birefringence of the all fiber PZT phase modulator was analyzed in detail, a method of `align axis' in manufacturing all polarization maintaining fiber PZT phase modulator was put forward and realized on the first time. Demonstrated by experiment, it can effectively depress the polarization noise on the output caused by the stress induced birefringence in the all PZT phase modulator.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
TL;DR: In this paper, the use of linearly chirped fiber Bragg gratings with uniform coupling profile for compensating the dispersion of 100 km standard optical fiber link at 1550 nm is investigated theoretically for practical grating fabrication consideration.
Abstract: The use of linearly chirped fiber Bragg gratings with uniform coupling profile for compensating the dispersion of 100 km standard optical fiber link at 1550 nm are investigated theoretically for practical grating fabrication consideration. Numerical results show that a 40 mm long linearly chirped fiber Bragg grating with uniform coupling profile and optimal coupling strength can almost perfectly compensate the dispersion of 100 km standard communication fiber link up to 20 GHz. The dispersion delay curve of the fiber grating exhibits certain oscillation feature, and this does not significantly affect its dispersion compensation ability according to our calculations.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
TL;DR: In this article, the use of power chirped fiber Bragg gratings for dispersion cancellation in an optical fiber link is discussed, and a numerical and theoretical investigation of recompressing the dispersion-broadened pulse by using?-power chirping gratings is made, which shows that, after 100 km standard fiber (with zero dispersion at?? =?1.3?m) transmission at??=? 1.55?m with initial width of TFWHM?=?33ps (full width at half maximum) can be perfectly recompressed
Abstract: The use of ?-power chirped fiber Bragg gratings for dispersion cancellation in an optical fiber link is discussed. Numerical and theoretical investigation of recompressing the dispersion-broadened pulse by using ?-power chirped gratings is made, which shows that, the dispersion-broadened Gaussian pulse after 100 km standard fiber (with zero dispersion at ??=?1.3 ?m) transmission at ??=?1.55 ?m with initial width of TFWHM?=?33ps (full width at half maximum) can be perfectly recompressed with the peak reflectivity of 82% by using a 30 mm long ?-power chirped fiber grating with proper ? value and optimal grating parameters.
TL;DR: In this paper, a near 100% peak reflectivity fiber Bragg grating was fabricated by 248 nm KrF excimer laser irradiated a B/Ge co-doped fiber through a zero-order mulled phase mask and the growth property of fiber gratings was monitored using white light source and optical spectrum analyzer during the gratings formation.
Abstract: This paper reports the experimental results that near 100% peak reflectivity fiber Bragg grating have been fabricated by 248 nm KrF excimer laser irradiated a B/Ge co-doped fiber through a zero-order mulled phase mask and that the growth property of fiber gratings has been monitored using white light source and optical spectrum analyzer during the gratings formation. And we find that the evolution of the reflectivity of fiber gratings with exposure fluence can be perfectly fitted by power-law function of the form R equals cF(beta ).© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
TL;DR: In this article, the measurement of PMD is realized by two novel methods, modified OTDR methods and modified S-38 methods, and their results are consistent with these from wavelength scanning method.
Abstract: Recently, emphasis has been laid on Polarization Mode Dispersion (PMD) in high speed lightwave transmission systems, and it looms as a potentially dominant source of pulse distortion in ultrahigh-bit systems. The measurement of PMD is realized by two novel methods--modified OTDR methods and modified S-38 methods. Their results are consistent with these from wavelength scanning method.
TL;DR: In this article, a scheme using a large nonlinearity and polarization-independent dispersion-shifted optical fiber in the non-linearity loop mirror as an all-optical switching was proposed.
Abstract: We had put forward a scheme using a large nonlinearity and polarization-independent dispersion-shifted optical fiber in the nonlinearity loop mirror as an all-optical switching. So that, we can neglect the effect of fluctuation of states of polarization of signal wave or switching pulse wave. The characteristic of polarization-independent optical fiber is discussed in detail. Such a fiber will have a very promising future.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
TL;DR: In this article, a method for producing durable fused silica self-interference phase grating photomasks is described, where the gratin pattern is formed into AZ-1350 photoresist by 325nm He-Cd laser optical holographic exposure and is transferred to a thin metal layer via focused ion beam lithography.
Abstract: A novel method for producing durable fused silica self- interference phase grating photomasks is described in this paper. The gratin pattern is formed into AZ-1350 photoresist by 325nm He-Cd laser optical holographic exposure and is transferred to a thin metal layer via focused ion beam lithography, then reactive ion etching in CHF3/O2 plasma is used to etch the fused silica substrate. Inspection performed by scanning electron microscopy shows that fabricated silica phase masks are perfect and no reactive deposition is formed int he grating grooves.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
TL;DR: In this paper, the polarization effect of the all PM FOG is studied by using the Jones matrix theory on the first time, and the expression of the output noise is derived, which include the polarization degree (or extinction ratio) of the every element in the gyro system.
Abstract: The polarization effect of the all PM FOG is studied by using the Jones matrix theory on the first time. Above this study, the expression of the output noise is derived, which include the polarization degree (or extinction ratio) of the every element in the gyro system. The influence of each parameter on the detected polarization noise is theoretically analyzed, and an effective theory to reduce the detected noise is established.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.