Role of misalignment-induced angular chirp in the electro-optic detection of THz waves

David A. Walsh; Matthew Cliffe; R. Pan; E. W. Snedden; Darren Graham; W. A. Gillespie; S. P. Jamison

doi:10.1364/OE.22.012028

Role of misalignment-induced angular chirp in the electro-optic detection of THz waves

David A. Walsh, Matthew Cliffe, R. Pan, E. W. Snedden, Darren Graham, W. A. Gillespie, S. P. Jamison

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

Abstract

A general description of electro-optic detection including non-collinear phase matching and finite transverse beam profiles is presented. It is shown theoretically and experimentally that non-collinear phase matching in ZnTe (and similar materials) produces an angular chirp in the χ(2)- generated optical signal. Due to this, in non-collinear THz and probe arrangements such as single-shot THz measurements or through accidental misalignment, measurement of an undistorted THz signal is critically dependent on having sufficient angular acceptance in the optical probe path. The associated spatial walk-off can also preclude the phase retardation approximation used in THz-TDS. The rate of misalignment-induced chirping in commonly used ZnTe and GaP schemes is tabulated, allowing ready analysis of a detection system. © 2014 Optical Society of America.

Original language	English
Pages (from-to)	12028-12037
Number of pages	9
Journal	Optics Express
Volume	22
Issue number	10
DOIs	https://doi.org/10.1364/OE.22.012028
Publication status	Published - 12 May 2014

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title = "Role of misalignment-induced angular chirp in the electro-optic detection of THz waves",

abstract = "A general description of electro-optic detection including non-collinear phase matching and finite transverse beam profiles is presented. It is shown theoretically and experimentally that non-collinear phase matching in ZnTe (and similar materials) produces an angular chirp in the χ(2)- generated optical signal. Due to this, in non-collinear THz and probe arrangements such as single-shot THz measurements or through accidental misalignment, measurement of an undistorted THz signal is critically dependent on having sufficient angular acceptance in the optical probe path. The associated spatial walk-off can also preclude the phase retardation approximation used in THz-TDS. The rate of misalignment-induced chirping in commonly used ZnTe and GaP schemes is tabulated, allowing ready analysis of a detection system. {\textcopyright} 2014 Optical Society of America.",

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T1 - Role of misalignment-induced angular chirp in the electro-optic detection of THz waves

AU - Walsh, David A.

AU - Cliffe, Matthew

AU - Pan, R.

AU - Snedden, E. W.

AU - Graham, Darren

AU - Gillespie, W. A.

AU - Jamison, S. P.

PY - 2014/5/12

Y1 - 2014/5/12

N2 - A general description of electro-optic detection including non-collinear phase matching and finite transverse beam profiles is presented. It is shown theoretically and experimentally that non-collinear phase matching in ZnTe (and similar materials) produces an angular chirp in the χ(2)- generated optical signal. Due to this, in non-collinear THz and probe arrangements such as single-shot THz measurements or through accidental misalignment, measurement of an undistorted THz signal is critically dependent on having sufficient angular acceptance in the optical probe path. The associated spatial walk-off can also preclude the phase retardation approximation used in THz-TDS. The rate of misalignment-induced chirping in commonly used ZnTe and GaP schemes is tabulated, allowing ready analysis of a detection system. © 2014 Optical Society of America.

AB - A general description of electro-optic detection including non-collinear phase matching and finite transverse beam profiles is presented. It is shown theoretically and experimentally that non-collinear phase matching in ZnTe (and similar materials) produces an angular chirp in the χ(2)- generated optical signal. Due to this, in non-collinear THz and probe arrangements such as single-shot THz measurements or through accidental misalignment, measurement of an undistorted THz signal is critically dependent on having sufficient angular acceptance in the optical probe path. The associated spatial walk-off can also preclude the phase retardation approximation used in THz-TDS. The rate of misalignment-induced chirping in commonly used ZnTe and GaP schemes is tabulated, allowing ready analysis of a detection system. © 2014 Optical Society of America.

U2 - 10.1364/OE.22.012028

DO - 10.1364/OE.22.012028

M3 - Article

VL - 22

SP - 12028

EP - 12037

JO - Optics Express

JF - Optics Express

IS - 10

ER -

Role of misalignment-induced angular chirp in the electro-optic detection of THz waves

Abstract

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