Photoreflectance and photocurrent measurements using pressure tuned laser diodes

A modified gradient index (GRIN) lens is optimised for use in a liquid-type high pressure cell. It was found that high pressure changes the optical power of the gradient-index lenses by changing the index profile of the glass. In this paper, we present a modified GRIN lens in which these changes are compensated by the pressure-induced changes of the refraction index of the liquid used as a pressure medium. New lens was used for the collimation of the pressure tuned tapered laser working in external resonator. The lens proved to have the optical power almost independent of the pressure up to 1.6 GPa, as it allowed to obtain tuning range almost independent on pressure without the need of any modification of the optical setup.

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Gradient index collimator lens for high pressure applications

Piechal

Bercha

Dybała

et al. 2014

Review of Scientific Instruments

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Pressure tuning of laser diodes in the near-infrared up to 1850 nm: Operational characteristics and reliability studies

Bercha

Dybała

Piechal

et al. 2014

Review of Scientific Instruments

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Wavelength tuning of infrared laser diodes in the high-hydrostatic pressure setup is demonstrated and its reliability is discussed in detail. Major reliability issues concern the photochemical reactions on the laser facet and the presence of strong absorption bands above 1650 nm in typical pressure liquids that do not undergo phase transitions up to 20 kbar. Despite these difficulties spectrally wide-range pressure tuning can be achieved with sufficient reliability for spectroscopic applications.

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Photoluminescence excitation measurements using pressure-tuned laser diodes

Bercha

Ivonyak

Mędryk

et al. 2015

Review of Scientific Instruments

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Pressure-tuned laser diodes in external cavity were used as tunable sources for photoluminescence excitation (PLE) spectroscopy. The method was demonstrated in the 720 nm-1070 nm spectral range using a few commercial laser diodes. The samples for PLE measurements were quantum-well structures grown on GaAs and on InP. The method is superior to standard PLE measurements using titanium sapphire laser because it can be extended to any spectral range where anti-reflection coated laser diodes are available.

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Photoreflectance and photocurrent measurements using pressure tuned laser diodes

Cited by 4 publications

References 9 publications

Gradient index collimator lens for high pressure applications

Gradient index collimator lens for high pressure applications

Pressure tuning of laser diodes in the near-infrared up to 1850 nm: Operational characteristics and reliability studies

Photoluminescence excitation measurements using pressure-tuned laser diodes

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