Microspectroscopy of ultrafast laser inscribed channel waveguides in Yb: tungstate crystals

F. M. Bain; W. F. Silva; A. A. Lagatsky; R. R. Thomson; N. D. Psaila; A. K. Kar; W. Sibbett; D. Jaque; C. T A Brown

doi:10.1063/1.3573999

Microspectroscopy of ultrafast laser inscribed channel waveguides in Yb: tungstate crystals

F. M. Bain^*, W. F. Silva, A. A. Lagatsky, R. R. Thomson, N. D. Psaila, A. K. Kar, W. Sibbett, D. Jaque, C. T A Brown

^*Corresponding author for this work

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

We report microspectroscopy measurements of crystalline channel waveguides fabricated in Yb:KGd (WO₄)₂ and Yb:KY (WO ₄)₂ using the ultrafast laser inscription technique. From these measurements we find that densification of the WO₂ W bridge in the double tungstate crystal lattice is responsible for the refractive index increase, which creates the waveguide confinement. We identified that shifts toward lower energies in the ~760 cm^-1 Raman mode indicate regions, which guide light polarized along the crystallographic b axis, while higher energy shifts in the 682 and 898 cm^-1 Raman lines correspond to guiding regions for light polarized along the crystallographic a axis. © 2011 American Institute of Physics.

Original language	English
Article number	141108
Number of pages	3
Journal	Applied Physics Letters
Volume	98
Issue number	14
DOIs	https://doi.org/10.1063/1.3573999
Publication status	Published - 4 Apr 2011

Keywords

SPECTROSCOPY
RAMAN-SPECTRA
SINGLE-CRYSTALS
IRRADIATION

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10.1063/1.3573999

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@article{b9686174682842e7bb6c7b5ed2dc7c49,

title = "Microspectroscopy of ultrafast laser inscribed channel waveguides in Yb: tungstate crystals",

abstract = "We report microspectroscopy measurements of crystalline channel waveguides fabricated in Yb:KGd (WO4)2 and Yb:KY (WO 4)2 using the ultrafast laser inscription technique. From these measurements we find that densification of the WO2 W bridge in the double tungstate crystal lattice is responsible for the refractive index increase, which creates the waveguide confinement. We identified that shifts toward lower energies in the ~760 cm-1 Raman mode indicate regions, which guide light polarized along the crystallographic b axis, while higher energy shifts in the 682 and 898 cm-1 Raman lines correspond to guiding regions for light polarized along the crystallographic a axis. {\textcopyright} 2011 American Institute of Physics.",

keywords = "SPECTROSCOPY, RAMAN-SPECTRA, SINGLE-CRYSTALS, IRRADIATION",

author = "Bain, {F. M.} and Silva, {W. F.} and Lagatsky, {A. A.} and Thomson, {R. R.} and Psaila, {N. D.} and Kar, {A. K.} and W. Sibbett and D. Jaque and Brown, {C. T A}",

year = "2011",

month = apr,

day = "4",

doi = "10.1063/1.3573999",

language = "English",

volume = "98",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

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TY - JOUR

T1 - Microspectroscopy of ultrafast laser inscribed channel waveguides in Yb

T2 - tungstate crystals

AU - Bain, F. M.

AU - Silva, W. F.

AU - Lagatsky, A. A.

AU - Thomson, R. R.

AU - Psaila, N. D.

AU - Kar, A. K.

AU - Sibbett, W.

AU - Jaque, D.

AU - Brown, C. T A

PY - 2011/4/4

Y1 - 2011/4/4

N2 - We report microspectroscopy measurements of crystalline channel waveguides fabricated in Yb:KGd (WO4)2 and Yb:KY (WO 4)2 using the ultrafast laser inscription technique. From these measurements we find that densification of the WO2 W bridge in the double tungstate crystal lattice is responsible for the refractive index increase, which creates the waveguide confinement. We identified that shifts toward lower energies in the ~760 cm-1 Raman mode indicate regions, which guide light polarized along the crystallographic b axis, while higher energy shifts in the 682 and 898 cm-1 Raman lines correspond to guiding regions for light polarized along the crystallographic a axis. © 2011 American Institute of Physics.

AB - We report microspectroscopy measurements of crystalline channel waveguides fabricated in Yb:KGd (WO4)2 and Yb:KY (WO 4)2 using the ultrafast laser inscription technique. From these measurements we find that densification of the WO2 W bridge in the double tungstate crystal lattice is responsible for the refractive index increase, which creates the waveguide confinement. We identified that shifts toward lower energies in the ~760 cm-1 Raman mode indicate regions, which guide light polarized along the crystallographic b axis, while higher energy shifts in the 682 and 898 cm-1 Raman lines correspond to guiding regions for light polarized along the crystallographic a axis. © 2011 American Institute of Physics.

KW - SPECTROSCOPY

KW - RAMAN-SPECTRA

KW - SINGLE-CRYSTALS

KW - IRRADIATION

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U2 - 10.1063/1.3573999

DO - 10.1063/1.3573999

M3 - Article

SN - 0003-6951

VL - 98

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 14

M1 - 141108

ER -

Microspectroscopy of ultrafast laser inscribed channel waveguides in Yb: tungstate crystals

Abstract

Keywords

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