Experimental investigation of broad area quantum cascade lasers under external feedback

T. C. Newell; F. Grillot; A. Gavrielides; R. Kaspi; C. Lu; C. Yang; T. Bate; S. Luong

doi:10.1364/OE.26.017927

Experimental investigation of broad area quantum cascade lasers under external feedback

T. C. Newell, F. Grillot, A. Gavrielides, R. Kaspi, C. Lu, C. Yang, T. Bate, S. Luong

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

Abstract

Mode creation and temporal response of broad-area quantum cascade lasers (BA-QCL) placed within an external feedback cavity are described in this publication. The critical feedback parameter becomes the mirror angle relative to the BA-QCL facet. With judicious angle choices, a plethora of curious modes can be created, each with their particular threshold and slope efficiency. These range from a nearly single far-field intensity peak to highly multimode emission similar to their diode counterparts. Dynamics are strongly dominated by transverse mode competition ranging for less than 20MHz to greater than 100MHz. When the mirror is parallel to the facet, higher frequency external cavity oscillations become undamped.

Original language	English
Pages (from-to)	17927-17935
Number of pages	9
Journal	Optics Express
Volume	26
Issue number	14
DOIs	https://doi.org/10.1364/OE.26.017927
Publication status	Published - 9 Jul 2018
Externally published	Yes

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title = "Experimental investigation of broad area quantum cascade lasers under external feedback",

abstract = "Mode creation and temporal response of broad-area quantum cascade lasers (BA-QCL) placed within an external feedback cavity are described in this publication. The critical feedback parameter becomes the mirror angle relative to the BA-QCL facet. With judicious angle choices, a plethora of curious modes can be created, each with their particular threshold and slope efficiency. These range from a nearly single far-field intensity peak to highly multimode emission similar to their diode counterparts. Dynamics are strongly dominated by transverse mode competition ranging for less than 20MHz to greater than 100MHz. When the mirror is parallel to the facet, higher frequency external cavity oscillations become undamped.",

author = "Newell, \{T. C.\} and F. Grillot and A. Gavrielides and R. Kaspi and C. Lu and C. Yang and T. Bate and S. Luong",

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doi = "10.1364/OE.26.017927",

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T1 - Experimental investigation of broad area quantum cascade lasers under external feedback

AU - Newell, T. C.

AU - Grillot, F.

AU - Gavrielides, A.

AU - Kaspi, R.

AU - Lu, C.

AU - Yang, C.

AU - Bate, T.

AU - Luong, S.

PY - 2018/7/9

Y1 - 2018/7/9

N2 - Mode creation and temporal response of broad-area quantum cascade lasers (BA-QCL) placed within an external feedback cavity are described in this publication. The critical feedback parameter becomes the mirror angle relative to the BA-QCL facet. With judicious angle choices, a plethora of curious modes can be created, each with their particular threshold and slope efficiency. These range from a nearly single far-field intensity peak to highly multimode emission similar to their diode counterparts. Dynamics are strongly dominated by transverse mode competition ranging for less than 20MHz to greater than 100MHz. When the mirror is parallel to the facet, higher frequency external cavity oscillations become undamped.

AB - Mode creation and temporal response of broad-area quantum cascade lasers (BA-QCL) placed within an external feedback cavity are described in this publication. The critical feedback parameter becomes the mirror angle relative to the BA-QCL facet. With judicious angle choices, a plethora of curious modes can be created, each with their particular threshold and slope efficiency. These range from a nearly single far-field intensity peak to highly multimode emission similar to their diode counterparts. Dynamics are strongly dominated by transverse mode competition ranging for less than 20MHz to greater than 100MHz. When the mirror is parallel to the facet, higher frequency external cavity oscillations become undamped.

U2 - 10.1364/OE.26.017927

DO - 10.1364/OE.26.017927

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VL - 26

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EP - 17935

JO - Optics Express

JF - Optics Express

IS - 14

ER -

Experimental investigation of broad area quantum cascade lasers under external feedback

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