Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Gunnar Edwall"'
Publikováno v:
IEEE Photonics Technology Letters. 2:187-190
An integrated optical phase modulator which selectively modulates only one mode of polarization is discussed. Selectivity is accomplished by controlling the ratio between the voltages applied to two different electrode sections. A method for determin
Publikováno v:
Fiber Optic Sensors IV.
This paper discusses the potential use of polarisation selective phase modulators, PSPM, in interferometric fiber optical sensors. The principle of the PSPM is shortly reviewed. Two examples of the usefulness ofpolarisation selective phase modulation
Autor:
Walter Margulis, J.T. Kringlebotn, Raoul Stubbe, Adel Asseh, H. Storoy, Gunnar Edwall, Bengt Sahlgren, S. Sandgren
Publikováno v:
Electronics Letters. 31:969-970
A diode pumped Yb3+ DFB fibre laser comprising a single 10 cm Bragg grating with a permanent π/2 phase shift has been demonstrated. The DFB laser operates at 1047 nm with an in-fibre pump threshold < 230 µW and a 44% one-way slope efficiency. DFB o
Influence of crystallographic properties on antimony electrode potential—I. Polycrystalline material
Autor:
Gunnar Edwall
Publikováno v:
Electrochimica Acta. 24:595-603
Antimony—antimony oxide electrodes have been used widely as pH indicators in situations where glass-electrodes fail or cannot be tolerated. However, the obtainable accuracy in the pH determinations is seriously hampered by the relatively poor stabi
Autor:
Gunnar Edwall
Publikováno v:
Electrochimica Acta. 24:605-612
Publikováno v:
Critical Reviews in Analytical Chemistry. 21:29-47
The pH is one of the most important parameters for char-acterizing the chemical properties of an aqueous solution. The glass eiectrode is by far the most commonly used pH sensor. The determination of pH in special situations, e.g., in vivo applicatio
Autor:
Gunnar Edwall, Per-Arne Jöngren
Publikováno v:
Electrochimica Acta. 25:1585-1590
Measurements are presented which show that the oxygen sensitivity of ultra pure (6N) monocrystalline antimony electrodes presents an improved reproducibility and constancy as compared with monocrystalline electrodes containing impurity inclusions in
Publikováno v:
Electrochimica Acta. 27:581-586
Monocrystalline antimony electrodes have been studied by cyclic voltammetry in solutions containing sodium nitrate and one of the following complexing agents: TRIS [Tris (hydroxymethyl) amino methane], orthophosphate, EDTA (ethylenedinitrilo tetraace
Autor:
Gunnar Edwall
Publikováno v:
Electrochimica Acta. 24:613-621
Publikováno v:
Talanta. 33:125-134
Different ways of making pH-sensing electrodes from monocrystalline or polycrystalline antimony, iridium and palladium have been investigated. Monocrystalline antimony and iridium are superior to the polycrystalline elements with respect to reproduci