Mode beating in spot-size converter lasers

F. H.G.M. Wijnands; C. G. Crookes; P. M. Charles; R. M. Ash; I. F. Lealman; M. J. Robertson; A. E. Kelly; K. A. Williams; A. B. Massara; R. V. Penty; I. H. White

doi:10.1023/A:1020425610870

Mode beating in spot-size converter lasers

F. H.G.M. Wijnands
, C. G. Crookes
, P. M. Charles
, R. M. Ash
, I. F. Lealman
, M. J. Robertson
, A. E. Kelly
, K. A. Williams
, A. B. Massara
, R. V. Penty
, I. H. White

Onderzoeksoutput: Bijdrage aan tijdschrift › Tijdschriftartikel › Academic › peer review

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An anomalous modulation in the wavelength spectrum has been observed in lasers with spotsize converters. This intensity modulation is shown to be caused by beating between the fundamental lasing mode and radiation modes in the taper. This results in a periodic modulation in the net gain spectrum, which causes wavelength jumps between adjacent net gain maxima, and a drive current dependent spectral width that is expected to affect system performance. The amplitude of this spectral modulation is reduced significantly by either using an angled rear-facet which reflects the beating radiation modes away from the laser axis, or by using a nonlinear, adiabatic taper.

Originele taal-2	Engels
Pagina's (van-tot)	959-973
Aantal pagina's	15
Tijdschrift	Optical and Quantum Electronics
Volume	34
Nummer van het tijdschrift	10
DOI's	https://doi.org/10.1023/A:1020425610870
Status	Gepubliceerd - 1 okt 2002
Extern gepubliceerd	Ja

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F.W. thanks W.S. Ring and G. Trott for useful discussions. The authors thank Dr P. Heard from the Interface Analysis Centre, University of Bristol, for carrying out the focussed ion beam etching. K.W., A.M., R.P. and I.W. acknowledge the UK EPSRC Next Generation Laser Diode Initiative for financial support. K.W. acknowledges the Royal Society and AM the UK EPSRC for personal support.

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title = "Mode beating in spot-size converter lasers",

abstract = "An anomalous modulation in the wavelength spectrum has been observed in lasers with spotsize converters. This intensity modulation is shown to be caused by beating between the fundamental lasing mode and radiation modes in the taper. This results in a periodic modulation in the net gain spectrum, which causes wavelength jumps between adjacent net gain maxima, and a drive current dependent spectral width that is expected to affect system performance. The amplitude of this spectral modulation is reduced significantly by either using an angled rear-facet which reflects the beating radiation modes away from the laser axis, or by using a nonlinear, adiabatic taper.",

keywords = "Converters, Coupled mode analysis, Laser stability, Modulation, Semiconductor lasers, Spectral analysis",

author = "Wijnands, \{F. H.G.M.\} and Crookes, \{C. G.\} and Charles, \{P. M.\} and Ash, \{R. M.\} and Lealman, \{I. F.\} and Robertson, \{M. J.\} and Kelly, \{A. E.\} and Williams, \{K. A.\} and Massara, \{A. B.\} and Penty, \{R. V.\} and White, \{I. H.\}",

year = "2002",

month = oct,

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doi = "10.1023/A:1020425610870",

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T1 - Mode beating in spot-size converter lasers

AU - Wijnands, F. H.G.M.

AU - Crookes, C. G.

AU - Charles, P. M.

AU - Ash, R. M.

AU - Lealman, I. F.

AU - Robertson, M. J.

AU - Kelly, A. E.

AU - Williams, K. A.

AU - Massara, A. B.

AU - Penty, R. V.

AU - White, I. H.

PY - 2002/10/1

Y1 - 2002/10/1

N2 - An anomalous modulation in the wavelength spectrum has been observed in lasers with spotsize converters. This intensity modulation is shown to be caused by beating between the fundamental lasing mode and radiation modes in the taper. This results in a periodic modulation in the net gain spectrum, which causes wavelength jumps between adjacent net gain maxima, and a drive current dependent spectral width that is expected to affect system performance. The amplitude of this spectral modulation is reduced significantly by either using an angled rear-facet which reflects the beating radiation modes away from the laser axis, or by using a nonlinear, adiabatic taper.

AB - An anomalous modulation in the wavelength spectrum has been observed in lasers with spotsize converters. This intensity modulation is shown to be caused by beating between the fundamental lasing mode and radiation modes in the taper. This results in a periodic modulation in the net gain spectrum, which causes wavelength jumps between adjacent net gain maxima, and a drive current dependent spectral width that is expected to affect system performance. The amplitude of this spectral modulation is reduced significantly by either using an angled rear-facet which reflects the beating radiation modes away from the laser axis, or by using a nonlinear, adiabatic taper.

KW - Converters

KW - Coupled mode analysis

KW - Laser stability

KW - Modulation

KW - Semiconductor lasers

KW - Spectral analysis

UR - https://www.scopus.com/pages/publications/0036804011

U2 - 10.1023/A:1020425610870

DO - 10.1023/A:1020425610870

M3 - Article

AN - SCOPUS:0036804011

SN - 0306-8919

VL - 34

SP - 959

EP - 973

JO - Optical and Quantum Electronics

JF - Optical and Quantum Electronics

IS - 10

ER -

Mode beating in spot-size converter lasers

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