Laser-diode interferometry

Ishii, Yukihiro

doi:10.1016/s0079-6638(03)46003-4

Cited by 16 publications

(9 citation statements)

References 140 publications

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“…29,30 In a Mach–Zehnder experiment, a laser beam is split into a reference and a sample beam. The sample beam propagates through the experimental volume before recombining with the reference beam.…”

Section: Methodsmentioning

confidence: 99%

Use of Cross-Linked Poly(ethylene glycol)-Based Hydrogels for Protein Crystallization

Gavira¹,

Cera-Manjarres

Ortiz

et al. 2014

Crystal Growth & Design

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Poly(ethylene glycol) (PEG) hydrogels are highly biocompatible materials extensively used for biomedical and pharmaceutical applications, controlled drug release, and tissue engineering. In this work, PEG cross-linked hydrogels, synthesized under various conditions, were used to grow lysozyme crystals by the counterdiffusion technique. Crystallization experiments were conducted using a three-layer arrangement. Results demonstrated that PEG fibers were incorporated within lysozyme crystals controlling the final crystal shape. PEG hydrogels also induced the nucleation of lysozyme crystals to a higher extent than agarose. PEG hydrogels can also be used at higher concentrations (20–50% w/w) as a separation chamber (plug) in counterdiffusion experiments. In this case, PEG hydrogels control the diffusion of the crystallization agent and therefore may be used to tailor the supersaturation to fine-tune crystal size. As an example, insulin crystals were grown in 10% (w/w) PEG hydrogel. The resulting crystals were of an approximate size of 500 μm.

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Section: Methodsmentioning

confidence: 99%

Use of Cross-Linked Poly(ethylene glycol)-Based Hydrogels for Protein Crystallization

Gavira¹,

Cera-Manjarres

Ortiz

et al. 2014

Crystal Growth & Design

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“…In 2004, the fundamental properties of the LD, the history of the technical developments of LD interferometers, and numerous papers on LD interferometry were summarized by Ishii in a review article [2]. Most interferometers use a periodic signal such as a stepped [3,4], triangular [5,6], or sinusoidal [7][8][9] signal for direct phase modulation.…”

Section: Introductionmentioning

confidence: 99%

Phase-shifting laser diode interferometer using pulse modulation

et al. 2012

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A phase-shifting laser diode interferometer that uses direct pulse modulation is proposed and demonstrated. We found that a laser beam with a wide range of wavelength variation at constant optical power could be generated when a pulsed current was injected into the laser diode. We constructed a highly accurate interferometer by using a pair of interferometers. Several experiments, such as observations of temporal interference signals and spatial interferograms, measurement of a concave mirror, and duplicate measurements, confirmed the characteristics of pulse modulation and demonstrated the effectiveness of our technique.

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“…An image can be reconstructed by numerical calculation 5) . A synthetic wavelength can be well generated by changing the current in laser diodes (LDs) 6,7) . A short synthetic wavelength can be formed by using a wide tunable LD such as an external-cavity laser diode (ECLD).…”

Section: Introductionmentioning

confidence: 99%

Tunable laser-diode digital holographic interferometry without measuring wavelength differences

Ishii

Yoshida

2010

SPIE Proceedings

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Multiple-wavelength holographic interferometry is an effective technique to generate a contour map of a diffusely reflecting object surface in the speckle field. A synthetic wavelength can be well generated by changing the current of laser diodes. A small synthetic wavelength needs a wide tunable external-cavity laser diode. A step object profile with discontinuous structure can be measured by using a synthetic wavelength to be sufficiently large that is derived from a known step height measured by vernier calipers but not wavelength measurements. The tunable laser-diode holographic interferometry is verified by experimental results.

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Laser-diode interferometry

Cited by 16 publications

References 140 publications

Use of Cross-Linked Poly(ethylene glycol)-Based Hydrogels for Protein Crystallization

Use of Cross-Linked Poly(ethylene glycol)-Based Hydrogels for Protein Crystallization

Phase-shifting laser diode interferometer using pulse modulation

Tunable laser-diode digital holographic interferometry without measuring wavelength differences

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