Mode tuning of quantum cascade lasers through optical processing of chalcogenide glass claddings

Shanshan Song; Scott S. Howard; Zhijun Liu; Afusat O. Dirisu; Claire F. Gmachl; Craig B. Arnold

doi:10.1063/1.2236296

Mode tuning of quantum cascade lasers through optical processing of chalcogenide glass claddings

Shanshan Song, Scott S. Howard, Zhijun Liu, Afusat O. Dirisu, Claire F. Gmachl, Craig B. Arnold

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

72 Scopus citations

Abstract

In this letter, we demonstrate a method of tuning quantum cascade (QC) lasers by modifying the optical properties of an overlying cladding material. An amorphous chalcogenide cladding layer is deposited through a low temperature, solvent-casting technique that is compatible with current QC laser fabrication and operation. Above band gap illumination (λ < 530 nm) of this cladding causes a permanent change in its index of refraction leading to a change of the modal refractive index and a corresponding modal shift in the laser. Combined with deep-etched distributed Bragg gratings, a tuning of over 30 nm is obtained at an operating wavelength of 7.9 μm for constant current and temperature.

Original language	English (US)
Article number	041115
Journal	Applied Physics Letters
Volume	89
Issue number	4
DOIs	https://doi.org/10.1063/1.2236296
State	Published - 2006

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.2236296

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title = "Mode tuning of quantum cascade lasers through optical processing of chalcogenide glass claddings",

abstract = "In this letter, we demonstrate a method of tuning quantum cascade (QC) lasers by modifying the optical properties of an overlying cladding material. An amorphous chalcogenide cladding layer is deposited through a low temperature, solvent-casting technique that is compatible with current QC laser fabrication and operation. Above band gap illumination (λ < 530 nm) of this cladding causes a permanent change in its index of refraction leading to a change of the modal refractive index and a corresponding modal shift in the laser. Combined with deep-etched distributed Bragg gratings, a tuning of over 30 nm is obtained at an operating wavelength of 7.9 μm for constant current and temperature.",

author = "Shanshan Song and Howard, {Scott S.} and Zhijun Liu and Dirisu, {Afusat O.} and Gmachl, {Claire F.} and Arnold, {Craig B.}",

note = "Funding Information: The authors gratefully acknowledge partial financial support from NSF-DMR-0213706 through the Princeton University MRSEC PCCM and from DARPA L-PAS. The authors also acknowledge assistance from D. Recht and U. Honnah.",

year = "2006",

doi = "10.1063/1.2236296",

language = "English (US)",

volume = "89",

journal = "Applied Physics Letters",

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TY - JOUR

T1 - Mode tuning of quantum cascade lasers through optical processing of chalcogenide glass claddings

AU - Song, Shanshan

AU - Howard, Scott S.

AU - Liu, Zhijun

AU - Dirisu, Afusat O.

AU - Gmachl, Claire F.

AU - Arnold, Craig B.

N1 - Funding Information: The authors gratefully acknowledge partial financial support from NSF-DMR-0213706 through the Princeton University MRSEC PCCM and from DARPA L-PAS. The authors also acknowledge assistance from D. Recht and U. Honnah.

PY - 2006

Y1 - 2006

N2 - In this letter, we demonstrate a method of tuning quantum cascade (QC) lasers by modifying the optical properties of an overlying cladding material. An amorphous chalcogenide cladding layer is deposited through a low temperature, solvent-casting technique that is compatible with current QC laser fabrication and operation. Above band gap illumination (λ < 530 nm) of this cladding causes a permanent change in its index of refraction leading to a change of the modal refractive index and a corresponding modal shift in the laser. Combined with deep-etched distributed Bragg gratings, a tuning of over 30 nm is obtained at an operating wavelength of 7.9 μm for constant current and temperature.

AB - In this letter, we demonstrate a method of tuning quantum cascade (QC) lasers by modifying the optical properties of an overlying cladding material. An amorphous chalcogenide cladding layer is deposited through a low temperature, solvent-casting technique that is compatible with current QC laser fabrication and operation. Above band gap illumination (λ < 530 nm) of this cladding causes a permanent change in its index of refraction leading to a change of the modal refractive index and a corresponding modal shift in the laser. Combined with deep-etched distributed Bragg gratings, a tuning of over 30 nm is obtained at an operating wavelength of 7.9 μm for constant current and temperature.

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JF - Applied Physics Letters

IS - 4

M1 - 041115

ER -

Mode tuning of quantum cascade lasers through optical processing of chalcogenide glass claddings

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