Papers by Keyword: Michelson Interferometer

Abstract: In this paper is considered the autocorrelator of ultrashort pulses based a Michelson interferometer, his schemes and operating principles. The method of measuring ultrashort pulses is given. The schemes and principles of operation of the main nodes of the autocorrelation receiver are presented: the optical-mechanical part (the construction of the Michelson interferometer) and the electronic part, which includes a photodetector module, a control and data processing unit with a speaker amplifier, and a personal computer.

Abstract: Shape memory alloy (SMA) is an intermetallic compound able to recover, in a predetermined shape during a thermal cycle while generating mechanical work. The primary objective of this research is to develop a shape memory alloy based micro-positioning stage. This paper reports about the training, actuation method of NiTi shape Memory alloy thin sheets and its displacement measurement through Michelson Interferometer. The SMA based Tripod was fabricated the actuation was done using an electrical biasing with 5 A(1.2 Volt) where a displacement of around 6.10 mm was achieved. The actuation studies were also performed using a laser with a optimum fluence of 100 mJ/cm² that is of upto7.25 mm achieved.

Abstract: In this paper, a modified Michelson interferometer is designed to measure Terahertz spectrum. Compared with normal Michelson interferometer, hollow retroreflectors are used instead of flat mirrors as reflective mirrors. The theory analysis and some measurement are given.

Abstract: This paper presents an architecture to simplify a Michelson Interferometer, designed with MEMS technology in order to obtain the near infrared wavelengths in the range of [1620-1800 nm], which will be used in a non-invasive micro sensor of glucose. The input interferometer is fed with a white light source. The poli-silicon, superficial and bulk processes are utilized to design the architecture. The interferometer is based on dividing the design into three parts formed by two gears, a zipper and two mirrors at 90° each of one, for achieving resolution improvement without decreasing mechanical resistance of the parts. Each part is modeled mathematically and their behavior is verified using different analysis in-SolidWorksTM. On the other hand, the beamsplitter of the Michelson Interferometer is placed at 45° with respect to mirrors. The simulation results demonstrate the validity of the behavior of interferometer proposed.

Abstract: When putting a gas cylinder on the light path of a Michelson interferometer, the changes of the cylinder's gas pressure will make a difference to the optical path of the two beams of light, which finally changes the number of the interference fringes. Based on the principles above, a new method was forward a to measure gas's refractive index in this research. First, use a linear CCD (Charge Coupled Device) as photoelectric sensor to capture light signal, then, turn the electrical signal from photoelectric sensor into digital signal, which would later be transferred to microcomputer through USB interface. Finally, figure out the gas's refractive index in real-time using microcomputer.

Abstract: The energy flow of equal inclination interference fringes in Michelson interference measurement is theoretically calculated, and its variation with the optical path difference is also analyzed. When the ratio order of interference radius to focal length of the lens is as low as 10-2 or lower, the energy flow variation with the optical path difference is sinusoidal with period λ/2. Simulation is made via Matlab to verify the theoretical calculation and good agreement has been obtained between theoretical analysis and simulation. The parameters to be measured can be achieved via the record of the change in stripe energy flow, which is superior to the conventional method recording variation in stripe light intensity in good stability and strong anti-jam.

Abstract: A method has been forward to measure the samll vibration based on Michelson Interferometer, and the Doppler Effect is under consideration.The information about vibration can be detected by the photo detector and display on the digital oscilloscope at the same time.

Abstract: This study presents an enhanced common path interference system designed to measure the refractive index of crystal optical components. The proposed system is based on the classic Michelson interferometer and comprises a frequency stabilized helium-neon (He-Ne) laser, a beam splitter, a fixed mirror, an adjustable mirror, and a light detection system. The waveplate of interest was clamped to a rotatory motor and positioned between the beam splitter and the fixed mirror. The refractive index of the waveplate was then derived from the change in rotational angle of the waveplate as it moved from one position of minimum interference to the next. The measurement system proposed in this study is simple in construction, straightforward in operation, and robust to the effects of experimental noise. Furthermore, the system is a non-contact measurement system, and hence does not damage the optical component of interest. The experimental results are found to be in good agreement with the theoretical results. Therefore, the proposed system provides a viable means for the rapid experimental evaluation of the optical characteristics of quartz components.