Study on high-speed optical frequency shifter utilizing polarization-reversal structure

利用偏振反转结构的高速光学移频器的研究

• 批准号: 16360174
• 负责人: MURATA Hiroshi
• 金额: $ 9.66万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360174/
• 关键词: Optical frequency shifter; electrooptic modulation; polarization reversal; optical waveguide; quasi velocity matching; optical integrated circuit; lithium tantalate; 共振電極

An optical frequency shifter (OFS) is an important device in many optoelectronics systems, such as, optical communication systems, optical signal processing, optical measurements, laser spectroscopy, laser cooling, photochemistry, and so on. However, the operation frequencv of a commerciallv available OFS by acousto-optic effects is in several hundred MHz, therefore, a high-speed OFS with the operation frequency over GHz is expected in many application fields.In this research project, we have studied a novel electrooptic (EO) high-speed OFS by using a new guided-wave optical circuit, which we call as '3-branch waveguide interferometer' and the polarization-reversal techology of ferroelectric materials. This OFS is very compact and can be operated in very high frequency (1-100GHz) with only a single RF modulation signal and DC bias voltages. A continuous sweep of optical frequency over several GHz is possible, and the direction of a frequency shift (upper or lower) can be switched by tuning DC bias voltages.The operation of the proposed OFS has been analyzed in detail and proto-type devices has been designed and fabricated by use of z-cut LiTaO_3. In the experiment, basic operations of the fabricated OFS have been confirmed successfully around the designed operational frequency of 15GHz and 25GHz.The applications of the fabricated OFS to a wavelength-division-multiplexing (WDM) optical fiber communication system have carried out and optical frequencies of several muitiplexed signals have been shifted simultaneously by using the fabricated OFS. The applications to laser spectroscopy have also carried out and absorption spectrum of a standard gas-cell has been measured by using the fabricated OFS.

光学频率变速器（OFS）是许多光电系统中的重要设备，例如光学通信系统，光学信号处理，光学测量，激光光谱，激光冷却，光化学等。然而，声音效应可通过的商业LV的运行频率在数百个MHz中，因此，在许多应用领域中，预计具有GHz的高速频率。在这项研究项目中，我们研究了一个通过使用新的指导波光学电路，新型的电型（EO）高速OFS，我们称之为“ 3支支波导干涉仪”和铁电材料的极化 - 反转技术学。此OFS非常紧凑，只能以非常高的频率（1-100GHz）操作，只有单个RF调制信号和直流偏置电压。可以通过调谐DC偏置电压切换频移（上或下）的连续光频率，并且可以切换频移（上或下）。已详细分析了建议的OFS的操作，并且原型设备的操作已详细分析是通过使用Z-Cut Litao_3设计和制造的。在实验中，已在设计的15GHz和25GHz的设计操作频率成功地确认了制造的OFS的基本操作。制造的OFS应用于波长 - 划分 - 多路复用（WDM）光纤通信系统，并进行了光学频率和光学频率通过使用的制造的OFS，已经同时移动了几个Muitiplex的信号中的几个信号。也已经进行了激光光谱的应用，并使用制造的OFS测量了标准气体细胞的吸收光谱。

项目成果

Electro-optic single-sideband modulator with resonant electrodes and polarization-reversed structures

具有谐振电极和偏振反转结构的电光单边带调制器

• 发表时间: 2006
• 期刊: Japanese Journal of Applied Physics (in press)
• 作者: Shigehiko Matsunaga;Hiroshi Murata
• 通讯作者: Hiroshi Murata

Electrooptic single-sideband modulator using resonant electrodes and polarization-reversed structure

使用谐振电极和偏振反转结构的电光单边带调制器

• 发表时间: 2005
• 期刊: Proceedings of the Confernce on Lasers and Electro-Optics 2005 (CLEO2005) 1・1
• 作者: Hiroshi Murata;et al.
• 通讯作者: et al.

Resonant electrode guided-wave electrooptic phase modulator using polarization-reversal structures

采用偏振反转结构的谐振电极导波电光相位调制器

• 发表时间: 2005
• 期刊: Electronics Letters 41・8
• 作者: Shigehiko Matsunaga;Hiroshi Murata;Akira Enokihara;Hiroshi Murata
• 通讯作者: Hiroshi Murata

Guided-wave electro-optic modulators using novel electrode structure of coupled microstrip line resonator

采用新型耦合微带线谐振器电极结构的导波电光调制器

• 发表时间: 2005
• 期刊: IEICE Transaction of Electronics E88-C・3
• 作者: Shigehiko Matsunaga;Hiroshi Murata;Akira Enokihara
• 通讯作者: Akira Enokihara

Guided- wave electro-optic modulators using novel electrode structure of coupled microstrip line resonator

采用新型耦合微带线谐振器电极结构的导波电光调制器

• 发表时间: 2005
• 期刊: IEICE Transaction of Electronics Vol.E88-C, No.3
• 作者: Akira Enokihara;Hiroyoshi Yajima;Hiroshi Murata;Yasuyuki Okamura
• 通讯作者: Yasuyuki Okamura