A cascadable polarization-based 1-to-9 multimode optical fiber switch using a PMMA fiber array holder

Berghmans, Francis; Nasiłowski, Tomasz; Zdrodowski, K.; Radomski, K.; Bekiesza, A.; Carnicer, Y.; Kufner, Stefan; Kufner, M.; Decréton, M.; Veretennicoff, Irina; Thienpont, Hugo

doi:10.1109/50.704612

Cited by 4 publications

(1 citation statement)

References 17 publications

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“…Viscoelastic properties, optical properties, and thermal properties of poly(methyl‐methacrylate) (PMMA) synthesized by conventional methods have been reported in literature 1–5. Still a complete thermal study on poly(methyl acrylate) (PMA) for thermal diffusivity is sparse.…”

Section: Introductionmentioning

confidence: 99%

The measurement of thermal diffusivity in poly(methyl acrylate) by photoacoustic technique

Rajan

Mathavan

Vivekanandam

et al. 2006

J of Applied Polymer Sci

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It is suggested that when a polymer is synthesized from a monomer and an added initiator in the presence of ultrasound, the process may produce polymers with predetermined structures and physical properties. An attempt is made to measure thermal diffusivity. Poly(methyl acrylate) (PMA) is synthesized using monomer methyl acrylate and an added initiator peroxodisulfate in the presence of ultrasound of frequency 35 kHz and power 100 W/cm2 at 50°C for various known sonication periods. PMA is obtained as a colorless, semitransparent solid. The solid PMA is cut into thin wafers in a highly symmetric direction to have uniform sizes. PMA samples are synthesized for 11 different sonication periods. These PMA samples are use to study their thermal diffusivity (α) by photoacoustic (PA) technique. Thermal diffusivity is calculated by measuring the amplitude and phase of the PA signal separately. A plot of the sonication period versus thermal diffusivity obtained from amplitude measurements of PMA indicates that there is an increase in thermal diffusivity from 2 × 10−6 to 4.7 × 10−6 m2/s when sonication period is increased from 30 to 330 min in steps of 30 min. The same trend is seen in a plot between sonication period and thermal diffusivity when the thermal diffusivity is calculated by PA phase measurements. There is a small difference in the experimental values obtained by the two measurements. Dependence of thermal diffusivity of PMA on ultrasonic sonication is discussed in detail. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 3756–3760, 2006

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Section: Introductionmentioning

confidence: 99%

The measurement of thermal diffusivity in poly(methyl acrylate) by photoacoustic technique

Rajan

Mathavan

Vivekanandam

et al. 2006

J of Applied Polymer Sci

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Heat transfer in poly(methyl acrylate) by photoacoustic measurements

Rajan¹,

Vivekanandam²,

Ramakrishnan³

et al. 2004

J of Applied Polymer Sci

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ABSTRACT:The thermal properties (thermal diffusivity, thermal effusivity, thermal conductivity, and specific heat capacity) of poly(methyl acrylate), which was obtained by ultrasonochemical polymerization, were measured experimentally with photoacoustic and other techniques. In addition, the thermal expansion of poly(methyl acrylate) was measured experimentally with an indigenously modified Fizeau's apparatus and is reported here for the first time to an accuracy of 0.05%. The results were compared with the available literature values and examined. Sinclare's apparatus was used to determine the specific heat capacity and matched well with differential scanning calorimetry measurements. The method-ofmixtures technique was an alternative method of determining the specific heat capacity.

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Optical arithmetic unit using bit-WDM

McAulay

2000

Optics & Laser Technology

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A cascadable polarization-based 1-to-9 multimode optical fiber switch using a PMMA fiber array holder

Cited by 4 publications

References 17 publications

The measurement of thermal diffusivity in poly(methyl acrylate) by photoacoustic technique

The measurement of thermal diffusivity in poly(methyl acrylate) by photoacoustic technique

Heat transfer in poly(methyl acrylate) by photoacoustic measurements

Optical arithmetic unit using bit-WDM

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