An optical angle sensor based on chromatic dispersion with a mode-locked laser source

Abstract Angle sensors based on the laser autocollimation are often employed to evaluate surface profiles of a target of interest. The authors have developed a femtosecond laser angle sensor, in which a spectrometer or an optical spectrum analyzer with a single-mode fiber is employed as the photodetector for simultaneous capturing of the multiple optical modes. In this paper, the concept of the femtosecond laser angle sensor is applied to evaluate the surface profile of a target of interest. An optical setup is designed in such a way that each mode in the spectrum of the mode-locked femtosecond is utilized as the laser beam to measure the local slope of a measurement target at each different point to evaluate the surface profile. Some basic experiments are carried out by using the developed optical setup with a mode-locked femtosecond laser source to evaluate basic performances of the developed optical setup as an optical angle sensor.

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Ultra-precision angle sensor with a mode-locked laser source

Proceedings of International Conference on Leading Edge Manufacturing in 21st century LEM21 ◽

10.1299/jsmelem.2017.9.076 ◽

2017 ◽

Vol 2017.9 (0) ◽

pp. 076

Author(s):

Shuhei MADOKORO ◽

Yuki SHIMIZU ◽

Yuan-Liu CHEN ◽

Wei GAO

Keyword(s):

Laser Source ◽

Angle Sensor ◽

Ultra Precision ◽

Mode Locked Laser

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Optical Heterodyning for Reduction of Chromatic Dispersion Sensitivity in 60 GHz Mode-Locked Laser Systems

Journal of Lightwave Technology ◽

10.1109/jlt.2013.2274871 ◽

2013 ◽

Vol 31 (17) ◽

pp. 2955-2960 ◽

Cited By ~ 3

Author(s):

Habeb Rzaigui ◽

Julien Poette ◽

Beatrice Cabon ◽

Friederike Brendel ◽

Ramin Khayatzadeh

Keyword(s):

Chromatic Dispersion ◽

60 Ghz ◽

Laser Systems ◽

Mode Locked Laser

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Performance Analysis of Subcarrier Multiplexed Optical Transmission System for QPSK Data

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.b3651.079220 ◽

2020 ◽

Vol 9 (2) ◽

pp. 466-476

Keyword(s):

Optical Transmission ◽

Dispersion Compensation ◽

Chromatic Dispersion ◽

Transmission System ◽

Laser Source ◽

Radio Link ◽

Link Distance ◽

Performance Results ◽

The Impact ◽

Dispersion And Attenuation

This paper focuses on the impact of different parameters on the performance of the Subcarrier Multiplexed Optical Transmission System for the application on radio link via optical fiber. Performance results are evaluated for QPSK data format for ODSB and OSSB modulation of Microwave subcarriers with digital NRZ coded random data patterns. The four subsystems of QPSK modulators are at 400, 500, 600, 700 MHz subcarrier frequencies with frequency spacing of 100 MHz. The power of subcarriers is decreasing with increasing the link distance due to dispersion and attenuation. By using dispersion compensation fiber, the link distance has been enhanced from 100 km to 240 km successfully. The impact of chromatic dispersion has been reduced in OSSB by using dual-electrode MZM. The constellation diagram also confirms that the phase of the signal after traveling through the link is changing due to dispersion. The phase is the same for subcarrier 600 MHz & 700 MHz for ODSB and OSSB in QPSK SCM. The impact of linewidth and responsivity on SNR has also analyzed to evaluate the performance. It is concluded that the maximum SNR is decreasing with increase in the linewidth of laser source and increasing with the increase in responsivity of PIN diode for the same fiber length in SCM transmission.

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Study of the Correction of Effects Chromatic Dispersion and Attenuation to Evaluate the Optical Transmission

Journal of Optical Communications ◽

10.1515/joc-2019-0010 ◽

2020 ◽

Vol 41 (2) ◽

pp. 209-214

Author(s):

Saliha Kheris ◽

Badra Bouabdallah

Keyword(s):

Optical Transmission ◽

Signal To Noise Ratio ◽

Chromatic Dispersion ◽

Optical Amplifier ◽

Laser Source ◽

Long Distance ◽

Optical Components ◽

Optical Detector ◽

Fiber Optical ◽

Dispersion And Attenuation

AbstractIn this paper, we have presented a global study of simple bonds, focusing on the main limitations introduced by different optical components as laser source, fiber, optical amplifier, and optical detector. The construction of a long-distance link requires the compensation of attenuation and chromatic dispersion phenomena. Thus, it is well known that the attenuations cause the drop of the signal intensity, whereas the pulse spreading, due to the dispersion, causes the increase of the Bit Error Rate (BER) and consequently the reduction of the signal to noise ratio (SNR). In this purpose, we have calculated the quality factor (Q) issues from the noisy signal’s simulations. We have found a Q of 7.02 to a BER of 0.8 e−12. The founding results match well with fixes norms in telecommunication field.

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