Design and analysis of monolithic Q-switch Nd3+: YLF waveguide laser using poled-polymer film as guiding layer

Shiro Yamakawa, Takeshi Kinoshita, Keisuke Sasaki, Tetsuo Taniuchi

Research output: Contribution to journalArticle

Abstract

A novel monolithic waveguide laser is proposed in which Q-switch operation is possible by the electro-optic effect with poled-polymer films as the waveguide. The characteristics are numerically obtained. Since Nd3+:YLF crystal with an index of refraction lower than those of other laser crystals is used, it is possible to use a polymer film as the waveguide. Due to the long fluorescent life of Nd3+:YLF, an effective Q-switch operation is possible. In this paper, the optimum waveguide parameters are determined by numerical simulation and the gain and the operating voltage of the electro-optic modulation are computed. The effect of the guided wave loss is taken into account. It is found that laser oscillation is possible with excitation of only several milliwatts even under a relatively large loss of 1 dB/cm. Also, by using the directional coupler configuration using the process capability of the polymer film as the Q-switch electro-optic modulator, a giant pulse with a peak power of 0.46 kW can be obtained with an excitation optical input of 100 mW and an operating voltage of 38.5 V.

Original languageEnglish
Pages (from-to)9-17
Number of pages9
JournalElectronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
Volume81
Issue number2
Publication statusPublished - 1998 Feb

Fingerprint

YLF lasers
waveguide lasers
Polymer films
electro-optics
Waveguides
Electrooptical effects
switches
Switches
waveguides
Lasers
polymers
directional couplers
electric potential
Crystals
excitation
Directional couplers
crystals
lasers
Guided electromagnetic wave propagation
Photoexcitation

Keywords

  • Nd
  • Optical integrated circuits
  • Poled-polymer thin film
  • Q-switch laser
  • Waveguide laser
  • YLF

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

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title = "Design and analysis of monolithic Q-switch Nd3+: YLF waveguide laser using poled-polymer film as guiding layer",
abstract = "A novel monolithic waveguide laser is proposed in which Q-switch operation is possible by the electro-optic effect with poled-polymer films as the waveguide. The characteristics are numerically obtained. Since Nd3+:YLF crystal with an index of refraction lower than those of other laser crystals is used, it is possible to use a polymer film as the waveguide. Due to the long fluorescent life of Nd3+:YLF, an effective Q-switch operation is possible. In this paper, the optimum waveguide parameters are determined by numerical simulation and the gain and the operating voltage of the electro-optic modulation are computed. The effect of the guided wave loss is taken into account. It is found that laser oscillation is possible with excitation of only several milliwatts even under a relatively large loss of 1 dB/cm. Also, by using the directional coupler configuration using the process capability of the polymer film as the Q-switch electro-optic modulator, a giant pulse with a peak power of 0.46 kW can be obtained with an excitation optical input of 100 mW and an operating voltage of 38.5 V.",
keywords = "Nd, Optical integrated circuits, Poled-polymer thin film, Q-switch laser, Waveguide laser, YLF",
author = "Shiro Yamakawa and Takeshi Kinoshita and Keisuke Sasaki and Tetsuo Taniuchi",
year = "1998",
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T2 - YLF waveguide laser using poled-polymer film as guiding layer

AU - Yamakawa, Shiro

AU - Kinoshita, Takeshi

AU - Sasaki, Keisuke

AU - Taniuchi, Tetsuo

PY - 1998/2

Y1 - 1998/2

N2 - A novel monolithic waveguide laser is proposed in which Q-switch operation is possible by the electro-optic effect with poled-polymer films as the waveguide. The characteristics are numerically obtained. Since Nd3+:YLF crystal with an index of refraction lower than those of other laser crystals is used, it is possible to use a polymer film as the waveguide. Due to the long fluorescent life of Nd3+:YLF, an effective Q-switch operation is possible. In this paper, the optimum waveguide parameters are determined by numerical simulation and the gain and the operating voltage of the electro-optic modulation are computed. The effect of the guided wave loss is taken into account. It is found that laser oscillation is possible with excitation of only several milliwatts even under a relatively large loss of 1 dB/cm. Also, by using the directional coupler configuration using the process capability of the polymer film as the Q-switch electro-optic modulator, a giant pulse with a peak power of 0.46 kW can be obtained with an excitation optical input of 100 mW and an operating voltage of 38.5 V.

AB - A novel monolithic waveguide laser is proposed in which Q-switch operation is possible by the electro-optic effect with poled-polymer films as the waveguide. The characteristics are numerically obtained. Since Nd3+:YLF crystal with an index of refraction lower than those of other laser crystals is used, it is possible to use a polymer film as the waveguide. Due to the long fluorescent life of Nd3+:YLF, an effective Q-switch operation is possible. In this paper, the optimum waveguide parameters are determined by numerical simulation and the gain and the operating voltage of the electro-optic modulation are computed. The effect of the guided wave loss is taken into account. It is found that laser oscillation is possible with excitation of only several milliwatts even under a relatively large loss of 1 dB/cm. Also, by using the directional coupler configuration using the process capability of the polymer film as the Q-switch electro-optic modulator, a giant pulse with a peak power of 0.46 kW can be obtained with an excitation optical input of 100 mW and an operating voltage of 38.5 V.

KW - Nd

KW - Optical integrated circuits

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KW - Waveguide laser

KW - YLF

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