Suppression of fluctuation of residual amplitude modulation in electro-optical phase modulators

Yongkai Deng; Ye Li; Jianping Cao; Chunqing Gao; Erjun Zang

Suppression of fluctuation of residual amplitude modulation in electro-optical phase modulators

Yongkai Deng^*, Ye Li, Jianping Cao, Chunqing Gao, Erjun Zang

^*Corresponding author for this work

School of Optics and Photonics

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

8 Citations (Scopus)

Abstract

Residual amplitude modulation (RAM) in electro-optical phase modulators (EOM) and its influence on the laser frequency shift of iodine-stabilized 532 nm laser are investigated experimentally. The relationships between the EOM crystal temperature and the RAM, as well as stabilized laser frequency are observed. The effects and problems of using active voltage feedback method to suppress the RAM are researched. An active temperature feedback method is proposed and demonstrated to suppress the RAM fluctuation by controlling the EOM temperature. With this method the suppression of the fundamental component in the RAM spectra overtakes 40 dB. The RAM fluctuation is controlled effectively, and additional frequency fluctuation is induced from adopting the system. The laser frequency stability can achieve or be better than 5 × 10^-15 for the averaging time from 100 s to 10⁴ s, and the stability of iodine-stabilized 532 nm laser frequency in a medium and long term is improved greatly.

Original language	English
Pages (from-to)	1062-1068
Number of pages	7
Journal	Guangxue Xuebao/Acta Optica Sinica
Volume	26
Issue number	7
Publication status	Published - Jul 2006

Keywords

Electro-optical phase modulation
Laser frequency stability
Laser technique
Residual amplitude modulation
Servo control

Cite this

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title = "Suppression of fluctuation of residual amplitude modulation in electro-optical phase modulators",

abstract = "Residual amplitude modulation (RAM) in electro-optical phase modulators (EOM) and its influence on the laser frequency shift of iodine-stabilized 532 nm laser are investigated experimentally. The relationships between the EOM crystal temperature and the RAM, as well as stabilized laser frequency are observed. The effects and problems of using active voltage feedback method to suppress the RAM are researched. An active temperature feedback method is proposed and demonstrated to suppress the RAM fluctuation by controlling the EOM temperature. With this method the suppression of the fundamental component in the RAM spectra overtakes 40 dB. The RAM fluctuation is controlled effectively, and additional frequency fluctuation is induced from adopting the system. The laser frequency stability can achieve or be better than 5 × 10-15 for the averaging time from 100 s to 104 s, and the stability of iodine-stabilized 532 nm laser frequency in a medium and long term is improved greatly.",

keywords = "Electro-optical phase modulation, Laser frequency stability, Laser technique, Residual amplitude modulation, Servo control",

author = "Yongkai Deng and Ye Li and Jianping Cao and Chunqing Gao and Erjun Zang",

year = "2006",

month = jul,

language = "English",

volume = "26",

pages = "1062--1068",

journal = "Guangxue Xuebao/Acta Optica Sinica",

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publisher = "Chinese Optical Society",

number = "7",

}

TY - JOUR

T1 - Suppression of fluctuation of residual amplitude modulation in electro-optical phase modulators

AU - Deng, Yongkai

AU - Li, Ye

AU - Cao, Jianping

AU - Gao, Chunqing

AU - Zang, Erjun

PY - 2006/7

Y1 - 2006/7

N2 - Residual amplitude modulation (RAM) in electro-optical phase modulators (EOM) and its influence on the laser frequency shift of iodine-stabilized 532 nm laser are investigated experimentally. The relationships between the EOM crystal temperature and the RAM, as well as stabilized laser frequency are observed. The effects and problems of using active voltage feedback method to suppress the RAM are researched. An active temperature feedback method is proposed and demonstrated to suppress the RAM fluctuation by controlling the EOM temperature. With this method the suppression of the fundamental component in the RAM spectra overtakes 40 dB. The RAM fluctuation is controlled effectively, and additional frequency fluctuation is induced from adopting the system. The laser frequency stability can achieve or be better than 5 × 10-15 for the averaging time from 100 s to 104 s, and the stability of iodine-stabilized 532 nm laser frequency in a medium and long term is improved greatly.

AB - Residual amplitude modulation (RAM) in electro-optical phase modulators (EOM) and its influence on the laser frequency shift of iodine-stabilized 532 nm laser are investigated experimentally. The relationships between the EOM crystal temperature and the RAM, as well as stabilized laser frequency are observed. The effects and problems of using active voltage feedback method to suppress the RAM are researched. An active temperature feedback method is proposed and demonstrated to suppress the RAM fluctuation by controlling the EOM temperature. With this method the suppression of the fundamental component in the RAM spectra overtakes 40 dB. The RAM fluctuation is controlled effectively, and additional frequency fluctuation is induced from adopting the system. The laser frequency stability can achieve or be better than 5 × 10-15 for the averaging time from 100 s to 104 s, and the stability of iodine-stabilized 532 nm laser frequency in a medium and long term is improved greatly.

KW - Electro-optical phase modulation

KW - Laser frequency stability

KW - Laser technique

KW - Residual amplitude modulation

KW - Servo control

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M3 - Article

AN - SCOPUS:33748464175

SN - 0253-2239

VL - 26

SP - 1062

EP - 1068

JO - Guangxue Xuebao/Acta Optica Sinica

JF - Guangxue Xuebao/Acta Optica Sinica

IS - 7

ER -

Suppression of fluctuation of residual amplitude modulation in electro-optical phase modulators

Abstract

Keywords

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