&lt;title&gt;Performance improvements in depolarized fiber gyros&lt;/title&gt;

Szafraniec, Bogdan; Feth, J. R.; Bergh, Ralph A.; Blake, J.

doi:10.1117/12.221716

Cited by 17 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2, where F down_Y and F up_Y is the modulation phase in the fast axis (Y-axis) applied on 'down' and 'up' electrode, respectively. Two secondary wave-trains are produced when a wave-train passes a crossover [7], but they can be ignored when the amplitude is much less than that of the main-wave. Finally, 126 most important secondary wave-trains (error wave-trains) and main wave-trains (signal wave-trains) are obtained by simulation, in which signal terms are produced by interference between some main wave-trains or some secondary wave-trains.…”

Section: Mechanics Analysismentioning

confidence: 99%

Bias error caused by broad-spectrum source and birefringence effect in fiber optical gyroscope

Zhang

Song

2009

Optik

View full text Add to dashboard Cite

Section: Mechanics Analysismentioning

confidence: 99%

Bias error caused by broad-spectrum source and birefringence effect in fiber optical gyroscope

Zhang

Song

2009

Optik

View full text Add to dashboard Cite

“…The output intensity of the PMF Segment

from fast-axis and slow-axis at Point

are denoted by

and

, respectively, which can be evaluated as:

where,

and

are the coupling coefficients of the Point

and

, respectively. The sign of

changes only for coupling from the fast to the slow axis as shown in [ 18 ]. In most cases, it has the relation

in the detection for distributed polarization couplings along PMF [ 19 ].…”

Section: Model and Analysismentioning

confidence: 99%

High-Order Interference Effect Introduced by Polarization Mode Coupling in Polarization—Maintaining Fiber and Its Identification

Yang

et al. 2016

Sensors

View full text Add to dashboard Cite

The high-order interference (HOI)—The interferogram introduced by polarization mode couplings (PMC) of multiple perturbations—Will cause misjudgment of the realistic coupling points in polarization-maintaining fiber (PMF) which is tested with a white light interferometer (WLI) with large dynamic range. We present an optical path tracking (OPT) method for simplifying the analysis of HOI, and demonstrate the enhancement and suppression conditions for the HOIs. A strategy is proposed to readily identify HOI by altering the spliced angle between polarizers’ pigtails and the PMF under test. Moreover, a PMF experiment with two perturbation points, for simplicity, is given as an example. As a result, all the characteristic interferograms including HOIs can be distinguished through just four measurements. Utilizing this identification method, we can estimate the realistic coupling points in PMFs and distinguish them from the interference signals including numerous HOIs.

show abstract

“…There is, however, another approach which most importantly obviates the need for the polarization-maintaining fibre loop and therefore can introduce useful cost savings. This is to use depolarized light as the source [18]. The depolarized light is created by placing a Lyot depolarizer (either in bulk optic or fibre optic formats) immediately after the broadband source.…”

Section: Optical Architecturesmentioning

confidence: 99%

The optical fibre Sagnac interferometer: an overview of its principles and applications

Culshaw

2005

Meas. Sci. Technol.

171

View full text Add to dashboard Cite

The optical fibre Sagnac interferometer was first demonstrated over 25 years ago. Immediately its potential for gyroscopic measurements became apparent and since the first demonstration substantial research and development investment has evolved a diversity of rotation measuring instruments. The fibre Sagnac interferometer has, however, also ventured into unexpected domains. The fibre loop mirror has become the ubiquitous reflector. Sagnac-based intruder alarms, hydrophones, geophones and current measuring systems have emerged. The Sagnac interferometer has expanded from the rotation measuring instrument into a very versatile sensing tool. Indeed, it is arguably the most successful of optical fibre sensing technologies. In this paper, we review both the principles and applications of the fibre Sagnac interferometer. The background theory highlights the need to understand the conditions for reciprocity within the interferometer network. The applications range from the expected gyroscopes into novel hydrophone arrays and intruder detection systems. The basic interferometer is now well understood and the engineering required to realize useful and effective instruments has been carefully defined. Its versatility though continues to amaze even the most experienced practitioner and doubtless its applications potential will continue to expand.

show abstract

<title>Performance improvements in depolarized fiber gyros</title>

Cited by 17 publications

References 11 publications

Bias error caused by broad-spectrum source and birefringence effect in fiber optical gyroscope

Bias error caused by broad-spectrum source and birefringence effect in fiber optical gyroscope

High-Order Interference Effect Introduced by Polarization Mode Coupling in Polarization—Maintaining Fiber and Its Identification

The optical fibre Sagnac interferometer: an overview of its principles and applications

Contact Info

Product

Resources

About