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Semiconductor Mirrors for Ultrafast Fiber Technology

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Semiconductor Mirrors for Ultrafast Fiber Technology. / Herda, Robert.

Tampere University of Technology, 2006. 52 s. (Tampere University of Technology. Publication; Vuosikerta 636).

Tutkimustuotos

Harvard

Herda, R 2006, Semiconductor Mirrors for Ultrafast Fiber Technology. Tampere University of Technology. Publication, Vuosikerta. 636, Tampere University of Technology.

APA

Herda, R. (2006). Semiconductor Mirrors for Ultrafast Fiber Technology. (Tampere University of Technology. Publication; Vuosikerta 636). Tampere University of Technology.

Vancouver

Herda R. Semiconductor Mirrors for Ultrafast Fiber Technology. Tampere University of Technology, 2006. 52 s. (Tampere University of Technology. Publication).

Author

Herda, Robert. / Semiconductor Mirrors for Ultrafast Fiber Technology. Tampere University of Technology, 2006. 52 Sivumäärä (Tampere University of Technology. Publication).

Bibtex - Lataa

@book{966bee57c8d340c19f12f7aa9760a997,
title = "Semiconductor Mirrors for Ultrafast Fiber Technology",
abstract = "This thesis studies the design of Semiconductor Saturable Absorber Mirrors (SESAMs) and their properties in mode-locked fiber lasers. The recovery times of SESAMs were controlled by ion bombardment and metamophoric growth. Quantum-dot structures enabled fast absorber recovery. In resonant saturable absorbers the modulation depth is enhanced, while the saturation fluence is decreased. The strong self-starting mechanism of high-modulation-depth and low-saturation-energy absorbers was used to achieve reliable mode locking without the need for dispersion compensation, while maintaining stability against Q-switched mode locking. It was shown that the two-photon absorption can become the dominant nonlinear mechanism in resonant SESAMs. Two-photon absorbtion in resonant absorbers can improve the stability against Q-switching instabilities; however, excessive two-photon absorption can decrease the modulation depth of a saturable absorber and, therefore, prevent mode locking.The influence of the SESAM recovery time on the pulse quality was investigated. A fast absorber is preferable in order to avoid instabilities in the pulse shapes and to generate highly compressible pulses. We studied the effect of the recovery time on the self-starting operation of a mode-locked fiber laser. It was shown that amplified spontaneous emission can saturate a slow absorber and, therefore, degrade the modulation depth and prevent self-starting operation. Finally, we demonstrated synchronized operation of a mode-locked µm erbium fiber laser to a mode-locked 1.05 µm ytterbium fiber laser using a semiconductor mirror as an optically driven modulator.",
author = "Robert Herda",
note = "Awarding institution:Tampere University of Technology<br/>Submitter:Made available in DSpace on 2008-09-23T09:20:41Z (GMT). No. of bitstreams: 1 herda.pdf: 2363220 bytes, checksum: 30f74d2993d5d519170bb932c22defd6 (MD5) Previous issue date: 2006-12-01",
year = "2006",
month = "12",
day = "1",
language = "English",
isbn = "952-15-1684-4",
series = "Tampere University of Technology. Publication",
publisher = "Tampere University of Technology",

}

RIS (suitable for import to EndNote) - Lataa

TY - BOOK

T1 - Semiconductor Mirrors for Ultrafast Fiber Technology

AU - Herda, Robert

N1 - Awarding institution:Tampere University of Technology<br/>Submitter:Made available in DSpace on 2008-09-23T09:20:41Z (GMT). No. of bitstreams: 1 herda.pdf: 2363220 bytes, checksum: 30f74d2993d5d519170bb932c22defd6 (MD5) Previous issue date: 2006-12-01

PY - 2006/12/1

Y1 - 2006/12/1

N2 - This thesis studies the design of Semiconductor Saturable Absorber Mirrors (SESAMs) and their properties in mode-locked fiber lasers. The recovery times of SESAMs were controlled by ion bombardment and metamophoric growth. Quantum-dot structures enabled fast absorber recovery. In resonant saturable absorbers the modulation depth is enhanced, while the saturation fluence is decreased. The strong self-starting mechanism of high-modulation-depth and low-saturation-energy absorbers was used to achieve reliable mode locking without the need for dispersion compensation, while maintaining stability against Q-switched mode locking. It was shown that the two-photon absorption can become the dominant nonlinear mechanism in resonant SESAMs. Two-photon absorbtion in resonant absorbers can improve the stability against Q-switching instabilities; however, excessive two-photon absorption can decrease the modulation depth of a saturable absorber and, therefore, prevent mode locking.The influence of the SESAM recovery time on the pulse quality was investigated. A fast absorber is preferable in order to avoid instabilities in the pulse shapes and to generate highly compressible pulses. We studied the effect of the recovery time on the self-starting operation of a mode-locked fiber laser. It was shown that amplified spontaneous emission can saturate a slow absorber and, therefore, degrade the modulation depth and prevent self-starting operation. Finally, we demonstrated synchronized operation of a mode-locked µm erbium fiber laser to a mode-locked 1.05 µm ytterbium fiber laser using a semiconductor mirror as an optically driven modulator.

AB - This thesis studies the design of Semiconductor Saturable Absorber Mirrors (SESAMs) and their properties in mode-locked fiber lasers. The recovery times of SESAMs were controlled by ion bombardment and metamophoric growth. Quantum-dot structures enabled fast absorber recovery. In resonant saturable absorbers the modulation depth is enhanced, while the saturation fluence is decreased. The strong self-starting mechanism of high-modulation-depth and low-saturation-energy absorbers was used to achieve reliable mode locking without the need for dispersion compensation, while maintaining stability against Q-switched mode locking. It was shown that the two-photon absorption can become the dominant nonlinear mechanism in resonant SESAMs. Two-photon absorbtion in resonant absorbers can improve the stability against Q-switching instabilities; however, excessive two-photon absorption can decrease the modulation depth of a saturable absorber and, therefore, prevent mode locking.The influence of the SESAM recovery time on the pulse quality was investigated. A fast absorber is preferable in order to avoid instabilities in the pulse shapes and to generate highly compressible pulses. We studied the effect of the recovery time on the self-starting operation of a mode-locked fiber laser. It was shown that amplified spontaneous emission can saturate a slow absorber and, therefore, degrade the modulation depth and prevent self-starting operation. Finally, we demonstrated synchronized operation of a mode-locked µm erbium fiber laser to a mode-locked 1.05 µm ytterbium fiber laser using a semiconductor mirror as an optically driven modulator.

M3 - Doctoral thesis

SN - 952-15-1684-4

T3 - Tampere University of Technology. Publication

BT - Semiconductor Mirrors for Ultrafast Fiber Technology

PB - Tampere University of Technology

ER -