A novel intracavity lens design for compact and high efficiency tapered laser diode

F. K. Lau; C. W. Tee; R. V. Penty; I. H. White; N. Michel; M. Krakowski

doi:10.1109/LPT.2006.890105

A novel intracavity lens design for compact and high efficiency tapered laser diode

F. K. Lau, C. W. Tee, R. V. Penty, I. H. White, N. Michel, M. Krakowski

Vice Chancellor's Office

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

Abstract

An integrated parabolic lens capable of introducing a diverging effect to the optical mode propagating within the cavity of a tapered laser is proposed and demonstrated. This idea allows broader high-power beams to be generated by shorter cavities. Diverging lenses with etch depths of 0.13 and 0.27 μm are implemented, with 12 (9.5%) and 16.8 μm(13.3%) overall broadening of the near-fields widths measured at 1/e² intensity. The peak output power as well as the threshold current is found to increase following the lens etching process, confirming the beneficial broadening effect introduced by the diverging lens.

Original language	English
Pages (from-to)	203-205
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	19
Issue number	4
DOIs	https://doi.org/10.1109/LPT.2006.890105
Publication status	Published - 15 Feb 2007

Keywords

Beam quality
Catastrophic optical mirror damage (COMD)
Diverging lens
Gaussian beam
High-brightness lasers
High-power lasers
Integrated lens
M factor
Mode expansion
Tapered lasers

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1109/LPT.2006.890105

Cite this

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abstract = "An integrated parabolic lens capable of introducing a diverging effect to the optical mode propagating within the cavity of a tapered laser is proposed and demonstrated. This idea allows broader high-power beams to be generated by shorter cavities. Diverging lenses with etch depths of 0.13 and 0.27 μm are implemented, with 12 (9.5%) and 16.8 μm(13.3%) overall broadening of the near-fields widths measured at 1/e2 intensity. The peak output power as well as the threshold current is found to increase following the lens etching process, confirming the beneficial broadening effect introduced by the diverging lens.",

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AU - Michel, N.

AU - Krakowski, M.

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KW - Beam quality

KW - Catastrophic optical mirror damage (COMD)

KW - Diverging lens

KW - Gaussian beam

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A novel intracavity lens design for compact and high efficiency tapered laser diode

Abstract

Keywords

ASJC Scopus subject areas

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