Performance Review of Multiple Reference Versus Time Domain Optical Coherence Tomography

Neuhaus, Kai; McNamara, Paul; Alexandrov, Sergey; O’Gorman, Seán; Hogan, Josh; Wilson, Carol; Leahy, Martin J.

doi:10.1109/jphot.2018.2828419

Cited by 6 publications

(5 citation statements)

References 37 publications

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“…To characterize the coherence envelope and localize its peak, a few measurements per half-period of the fringe pattern are needed. Measurement parallelization with polarizationmultiplexed phase shifting [65], multiple reference arm reflection planes [66] or off-axis holographic setups [67] are possible. Increasing object depth within the FOV leads to detrimental speckles and defocus-induced cross talk.…”

Section: Coherence Scanning Interferometrymentioning

confidence: 99%

Technology Selection for Inline Topography Measurement with Rover-Borne Laser Spectrometers

Ryan,

Haist,

Laskin

et al. 2024

Sensors

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This work studies enhancing the capabilities of compact laser spectroscopes integrated into space-exploration rovers by adding 3D topography measurement techniques. Laser spectroscopy enables the in situ analysis of sample composition, aiding in the understanding of the geological history of extraterrestrial bodies. To complement spectroscopic data, the inclusion of 3D imaging is proposed to provide unprecedented contextual information. The morphological information aids material characterization and hence the constraining of rock and mineral histories. Assigning height information to lateral pixels creates topographies, which offer a more complete spatial dataset than contextual 2D imaging. To aid the integration of 3D measurement into future proposals for rover-based laser spectrometers, the relevant scientific, rover, and sample constraints are outlined. The candidate 3D technologies are discussed, and estimates of performance, weight, and power consumptions guide the down-selection process in three application examples. Technology choice is discussed from different perspectives. Inline microscopic fringe-projection profilometry, incoherent digital holography, and multiwavelength digital holography are found to be promising candidates for further development.

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Section: Coherence Scanning Interferometrymentioning

confidence: 99%

Technology Selection for Inline Topography Measurement with Rover-Borne Laser Spectrometers

Ryan,

Haist,

Laskin

et al. 2024

Sensors

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“…If the light source has a Gaussian power distribution then the function G(δl) represents the Gaussian envelope of the interference amplitude along δl. The angular frequency is ω = 2πf and ϕ is the initial phase of the frequency content of the interference [15], [28]. Compared to TD-OCT, MR-OCT has an additional partial mirror (PM) in front of the scanning reference mirror.…”

Section: A Multiple Reference Optical Coherence Tomographymentioning

confidence: 99%

“…to incorporate the sum of reference and sample arm powers (P r and P s ) for each order N [15]. The component P PM0 is the power of the first reflection from the partial mirror back to the beam splitter and the detector describing most of the noncoherent DC background on the detector signal.…”

Section: A Multiple Reference Optical Coherence Tomographymentioning

confidence: 99%

“…Specifically, noise from the light source can efficiently be removed with balanced detection [13], [14]. Neuhaus et al report a two order of magnitude reduction of excess noise and one order of magnitude reduction of receiver noise compared to single photo-detector mode detection [15]. Balanced detection schemes and the advantages of fibre-based OCT systems are reported in the literature [16].…”

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confidence: 99%

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Evaluation of Signal Degradation Due to Birefringence in a Multiple Reference Optical Coherence Tomography System With Polarization-Based Balanced Detection

et al. 2022

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Although time-domain optical coherence tomography (TD-OCT) systems are straightforward to realize, the imaging speed, sensitivity, and imaging depth limit their range of applications. Multiple reference optical coherence tomography (MR-OCT) based on TD-OCT increases imaging range by about tenfold while providing sensitivity to image highly scattering biological samples. The multiple path-delays and freespace construction make MR-OCT also interesting for hybrid and compact systems, filling the gap between fibre-based and wafer-level integrated optical systems. We describe an optical configuration using a balanced detection scheme and the resulting signal properties due to the required use of polarizing optical components. We numerically simulate the signal properties using Jones calculus and compare the results with measurements. We discuss the origin of signal degradation due to birefringence of the sample in OCT and show that the quarter-wave plate in the sample arm of the Michelson interferometer can be adjusted to optimize the signal returning from a birefringent sample thereby improving the visibility of structures of interest. The theory discussed will be useful to understand and minimize signal degradation due to birefringence in Time-Domain and Fourier-Domain OCT systems.

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“…A typical example of the interferometric use of lowcoherence sources is the Optical Coherence Tomography i.e. OCT [6], [7]. Such technique is based on the light generated by a superluminescent diode (SLD) that is guided by a single mode fiber on living tissues (typically ocular tissues); light back-scattered from the different layers is collected and the signal resulting from the interference with a reference beam is detected using high-sensitivity and low-noise detectors, allowing reconstructing in-vivo three-dimensional map of tissues.…”

Section: Introductionmentioning

confidence: 99%

On the Feasibility of Absolute Distance Measurement by Using Optical Feedback Into a Superluminescent Diode Cavity

Rovati

Cecilia

Cattini

2020

IEEE Trans. Instrum. Meas.

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The development of accurate absolute distance interferometers is a long-term research goal. The key impact of this paper is the demonstration of an absolute distance interferometer based on the optical-feedback into a superluminescent diode cavity. Thanks to the optical-feedback, we obtained huge interference fringes even with diffusive targets and without using high-sensitivity and low-noise detectors, but directly exploiting the monitor photodiode enclosed in the same package of the optical source. The low coherence of the optical source makes the system robust to any stray-light along the optical path and thus suitable to work in biological media and dusty industrial environments. The proposed signal processing exploits a zero-crossing approach to determine the absolute target position. Preliminary results show a 95% expanded uncertainty to measuring interval ratio of about 60 ppm over a measuring interval of 50 mm.

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Performance Review of Multiple Reference Versus Time Domain Optical Coherence Tomography

Cited by 6 publications

References 37 publications

Technology Selection for Inline Topography Measurement with Rover-Borne Laser Spectrometers

Technology Selection for Inline Topography Measurement with Rover-Borne Laser Spectrometers

Evaluation of Signal Degradation Due to Birefringence in a Multiple Reference Optical Coherence Tomography System With Polarization-Based Balanced Detection

On the Feasibility of Absolute Distance Measurement by Using Optical Feedback Into a Superluminescent Diode Cavity

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