Time-space conversion system for analog transmission of holograms through single-mode fibers
Time-space conversion system for analog transmission of holograms through single-mode fibers
批准号:
12650349
负责人:
KANNARI Fumihiko
金额:
$2.24万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
2000
资助国家:
日本
项目状态:
已结题
起止时间:
2000 至 2001
中文摘要
通过单模光纤传输具有复幅度的并行数据阵列是一项具有挑战性的任务,这些数据阵列分布在二维空间中,并且在时间上变化,例如具有超高空间分辨率和许多灰度级的动态全息图。相干技术适合于在不进行模数转换的情况下同时传输幅度和相位。通过写入脉冲的光谱全息图并用连续波激光器将其读出,将时间信息转换为一维空间信息,以及相反的过程,即,将一维空间图案转换为具有4-f光学布置的时间图案(脉冲整形),将产生一种新的通过单模光纤的一维空间数据的相位和幅度的模拟传输方案。在本研究中,我们对几种基于时空转换的方案进行了实验研究,得到了以下结论:(1)传输…利用4-f傅里叶相干函数整形器的时空转换和光谱全息的时空转换,实验证明了低相干光通过单模光纤后的更多一维空间位相信息。基于一维空时转换技术和码分多址技术,提出了一种利用飞秒激光脉冲通过单模光纤进行二维并行数据传输的方案,并进行了数值模拟。提出了一种全光分组路由器,并对其基本功能进行了实验验证。该光路由器是由角度复用的光谱全息图组成的光路由器,其工作原理是将数据流卷积到预定的衍射角。较少
英文摘要
Transmission of parallel data arrays with complex amplitude, which distribute in a two-dimensional space and also temporally vary, e.g., a dynamic hologram with ultra high spatial resolution and many gray levels, through a single-mode optical fiber is a challenging task. A coherent technique would be suitable to transmit both the amplitude and phase without analog-digital conversion. The conversion of temporal information into one-dimensional spatial information by writing a spectral hologram of the pulse and reading it out with a continuous-wave laser, and the inverse process, i.e., the conversion of one dimensional spatial patterns into temporal patterns (pulse shaping) with a 4-f optical arrangement would lead to a novel analog transmission scheme for both phase and amplitude of one-dimensional spatial data through a single-mode fiber. In this study, we experimentally examined several schemes based on the time-space conversion and obtained the conclusions as follows:(1) Transmission … More of one-dimensional spatial phase information by low-coherence light through a single-mode fiber is experimentally demonstrated by use of space-time conversion at a 4-f Fourier coherence function shaper and time-space conversion with spectral holography. Space-time coupling caused by the transmitter limits the capacity of information transmittable with one coherence function shaping.(2) A new scheme for two-dimensional parallel data transmission with a femtosecond laser pulse through a single-mode fiber, which is based upon one-dimensional space-time conversion technique in conjunction with code division multiple access, is implemented and numerically demonstrated. Two-dimensional digital images in a 16 bits x 16 bits plane are successfully transmitted by a single femtosecond laser pulse at an equivalent transmission rate of 1.6 Tbit/s and recovered by spectral holography.(3) An all-optical packet router was proposed and its basic function was experimentally demonstrated The optical router consisting of angularly multiplexed spectral hologram works by routing the data stream, which is convoluted its own M-sequence code, to the pre-defined diffraction angle. Less
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Y. Teramura et al.: "Spatial Phase Information Transmission Through an Optical Fiber by coherence Function Synthesis"Appl. Opt.. Vol. 40, No. 35. 6466-6473 (2002)
Y. Teramura 等人:“通过相干函数合成通过光纤进行空间相位信息传输”Appl。
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T.Miura,K.Takasago,K.Kobayash,Z.Zhang,K.Torizuka,F.Kannari: "Timing jitter in a kilohertz regenerative amplifier of a femtosecond pulse Ti : Al_2O_3 laser"Optics Letters. Vol.25,No.24. 1795-1797 (2000)
T.Miura、K.Takasago、K.Kobayash、Z.Zhang、K.Torizuka、F.Kannari:“飞秒脉冲 Ti : Al_2O_3 激光器的千赫兹再生放大器中的定时抖动”光学快报。
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T.Miura,K.Takasago,K.Kobayash,Z.Zhang,K.Torizuka,F.Kannari: "Reduction of timing jitter with active control in a kHz regenerative amplifier of femtosecond pulse Ti : Al_2O_3 laser"Jpn.J.Appl.Phys.. Vol.40. (2001)
T.Miura,K.Takasago,K.Kobayash,Z.Zhang,K.Torizuka,F.Kannari:“通过主动控制在飞秒脉冲 Ti : Al_2O_3 激光器的 kHz 再生放大器中减少定时抖动”Jpn.J.Appl
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大野公久: "光分散フィルタによるフェムト秒レーザー再生増幅パルスの群遅延分散補償と波形整形"レーザー研究. Vol.29 No.8. 527-531 (2001)
Kimihisa Ohno:“使用光学色散滤波器的飞秒激光再生放大脉冲的群延迟色散补偿和波形整形”《激光研究》第 29 卷第 527-531 期(2001 年)。
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M.Sato: "Adaptive pulse shaping of femtosecond laser pulses in amplitude and phase by referring to the frequency resolved optical gating (FROG) pattern"Japanese Journal of Applied Physics (accepted for publication). (2002)
M.Sato:“通过参考频率分辨光选通 (FROG) 模式对飞秒激光脉冲在幅度和相位上进行自适应脉冲整形”《日本应用物理学杂志》(已接受出版)。
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共 21 条
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An arbitrarily shaped microwave source for ultra wideband radio communication using femtosecond laser pulse shaping
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财政年份:2005
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Generation and detection of bright quantum entangled light pulses using adaptive optical pulse control in frequency domain
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A Novel Light Routing Device with Phase Encoding using Liquid Crystal Spatial Light Modulator
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Organic electroluminescence cells fabricated by a novel laser ablation scheme with selective thin film growth
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财政年份:1996
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依托单位:
Encoding and decoding of amplitude or phase informations with a liquid-crystal array on femtosecond light pulses
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依托单位:
海外基金