Stability analysis of direct-detection cooperative optical beam tracking

Marola, G.; Santerini, D.; Prati, G.

doi:10.1109/7.30787

Cited by 20 publications

(13 citation statements)

References 2 publications

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“…Laser collimation technology has been widely used in the precision measurement [1][2][3] and optical communications fields [4,5]. But the effect of laser beam directional stability offset error reaches 10e-4~10e-6rad orders of magnitude [6,7], which seriously affect its further application for precision measurement.…”

Section: Introductionmentioning

confidence: 99%

Compensation of laser beam directional stability offset error by using translational spectroscope

Ding

Cui²,

Tan³

2010

SPIE Proceedings

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In order to improve the small range and poor dynamic performance of a flexible tilting mirror system for rapid compensation of laser beam directional stability offset error, a direct adjustment method is constructed by means of a translational spectroscope, which fixed on a piezoelectric actuator, to steer the laser beam to the collimating state, and to compensate for the displacement offset and angular offset of laser bean respectively. This method reduces the flexible rotation link in-between, avoids the backlash and lags error of friction and elastic deformation, and simplifies their control modes for the compensation process, thereby improving the control accuracy and dynamic performance of adjustment system. Experimental results show that, the tilted reflecting plane of the spectroscope can be used to steer the laser beam to the valid positions within the adjustment range up to 100μm, to compensate the offset error of the laser beam, or to compensate the vibration of laser source and the tilt error of detector installation, its control bandwidth above 100Hz. These results suggest this method can provide an effective solution for rapid precision collimation and compensation.Keyword： laser collimation，directional stability，beam offset，dynamic performance，tilting mirror system， translational spectroscope.

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Section: Introductionmentioning

confidence: 99%

Compensation of laser beam directional stability offset error by using translational spectroscope

Ding

Cui²,

Tan³

2010

SPIE Proceedings

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“…Since the active receiving area of the optical fiber is very small, when using the optical fiber as receiver, it is very difficult to couple the received power with the fiber; furthermore, the system is sensitive to the angle of incidence [7]. A beam tracking subsystem provides a useful method for AOA fluctuation compensation [8][9][10][11]. The received power in the beam-tracking system is influenced by the tracking error [10].…”

Section: Introductionmentioning

confidence: 99%

New time diversity structure used in free space optics links with a tracking system

Liu

2012

2012 1st IEEE International Conference on Communications in China Workshops (ICCC)

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This paper proposed a new time diversity structure using over free-space optics (FSO) links with a tracking system. A dual-diversity scheme with beam tracking introduces a powerfading model for an FSO system utilizing beam tracking through atmospheric turbulence. Further, the paper derives a closed-form bit error rate (BER) for time-diversity scheme, taking into account the tracking error, coherence of the diversity signals and photo detector noise. It is shown that time diversity is a clever mitigation technique for improving transmission reliability for the FSO system with beam tracking.

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“…Cooperative tracking systems were already studied by other researchers based on deterministic models [1,3,4]. These models describe the position-sensitive photodetector by a deterministic input-output relationship and employ deterministic functions to characterize the relative motion of the stations.…”

Section: Introductionmentioning

confidence: 99%

“…These models describe the position-sensitive photodetector by a deterministic input-output relationship and employ deterministic functions to characterize the relative motion of the stations. Using such a deterministic model, under a proportional control law, Wei and Gagliardi [3] evaluated the steady-state performance of the system and Marola et al studied stability properties [4].…”

Section: Introductionmentioning

confidence: 99%

Cooperative Stochastic Control for Optical Beam Tracking

Komaee

2007

2007 41st Annual Conference on Information Sciences and Systems

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Abstract. Maintaining optical alignment between stations of a free-space optical link requires a persistent beam tracking operation. This is achieved using a position-sensitive photodetector at each station which measures the azimuth and elevation of tracking error. A pointing assembly adjusts the heading of transceivers according to measurement of the tracking error. The measurement at each receiver also depends on the pointing error of the opposite transmitter, therefore a cooperative beam tracking system can be regarded as two dynamically coupled subsystems. We developed a stochastic model for a cooperative beam tracking system to get insight into solution of an associated optimal control problem with goal of maximizing the flow of optical power between the stations.

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Stability analysis of direct-detection cooperative optical beam tracking

Cited by 20 publications

References 2 publications

Compensation of laser beam directional stability offset error by using translational spectroscope

Compensation of laser beam directional stability offset error by using translational spectroscope

New time diversity structure used in free space optics links with a tracking system

Cooperative Stochastic Control for Optical Beam Tracking

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