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    • 63. 发明授权
    • Planar wave guide type optical amplifier
    • 平面波导型光放大器
    • US5381262A
    • 1995-01-10
    • US104662
    • 1993-08-11
    • Tadao ArimaKoji Okamura
    • Tadao ArimaKoji Okamura
    • H01S3/07G02B6/30G02B6/42H01S3/063H01S3/10H01S3/17G02B6/26
    • H01S3/063G02B6/305G02B6/4203
    • Disclosed are a planar wave guide type optical amplifier for amplifying a light signal passing through an optical fiber, a method of manufacturing the above light amplifier, and a laser oscillator using the light amplifier, The planar wave guide type optical amplifier comprises a first core formed to a bar shaped on a substrate and a light amplifying region composed of a part of the first core, having a configuration extending to the longitudinal direction of the first core, and doped with a rare earth element. The method of manufacturing the planar wave guide type optical amplifier comprises the steps of (1) forming a bar-shaped core on a plane substrate, (2) forming a groove to the core which extends to the longitudinal direction thereof, (3) filling the groove with a filler doped with a rare earth element and (4) solidifying the filler. The laser oscillator comprises a first core formed to a bar shape on a substrate, a light amplifying region composed of a part of the first core, having a configuration extending to the longitudinal direction of the first core, and doped with a rare earth element, and light reflecting means provided with the opposite ends of the first core, respectively,
    • 公开了一种用于放大通过光纤的光信号的平面波导型光放大器,制造上述光放大器的方法和使用该光放大器的激光振荡器。该平面波导型光放大器包括形成的第一芯 到形成在基板上的条形和由第一芯的一部分组成的光放大区域,具有延伸到第一芯的纵向的构造,并掺杂有稀土元素。 制造平面波导型光放大器的方法包括以下步骤:(1)在平面基板上形成棒状芯,(2)在芯的长度方向上形成凹槽,(3)填充 具有掺杂有稀土元素的填料的凹槽和(4)固化填料。 激光振荡器包括在基板上形成为棒状的第一芯体,由第一芯部的一部分构成的具有延伸到第一芯的纵向方向并且掺杂有稀土元素的构造的光放大区域, 以及分别设置有第一芯的相对端的光反射装置,
    • 67. 发明授权
    • Laser with coupled optical waveguides
    • 激光与耦合光波导
    • US5311540A
    • 1994-05-10
    • US849077
    • 1992-04-28
    • Jean-Paul PocholleEric LallierMichel Papuchon
    • Jean-Paul PocholleEric LallierMichel Papuchon
    • H01S3/063H01S3/067H01S3/07H01S3/094H01S3/101H01S3/23H01S5/40H01S3/082
    • H01S3/0675H01S3/063H01S3/094003H01S3/07H01S3/101H01S3/2383H01S5/4025
    • The invention relates to lasers, and more particularly to solid state lasers such as neodymium on lithium niobate crystal lasers. The invention provides a structure with several juxtaposed optical waveguides (12) sufficiently close to each other laterally to be coupled laterally. In order to take into account the risks of inhomogeneity in the refractive indices or inaccuracies in the dimensions which would alter the distribution of the electromagnetic field of the propagation supermode in the coupled structure, it is proposed to act on the value of the index of propagation in each guide using an individual control (generally electrical). Because of the variation in index, individually controlled, phase differences in the laser wave between the different guides are produced and these phase differences react on the composition of the electromagnetic field defining the supermode. It is possible to go as far as modifying the directivity of the laser beam by this electrical control. The control is preferably achieved by electrodes (14) placed in the vicinity of each guide. The guides are made of an electro-optical material such as lithium niobate, and neodymium doping, for example, allows the laser effect to appear in the very interior of the guides.
    • PCT No.PCT / FR91 / 00715 Sec。 371日期:1992年4月28日 102(e)日期1992年4月28日PCT 1991年9月10日PCT公布。 公开号WO92 / 04748 本发明涉及激光器,更具体地涉及固态激光器,例如铌酸锂晶体激光器上的钕。 本发明提供了一种结构,其具有横向彼此充分靠近彼此的几个并置的光波导(12),以横向耦合。 为了考虑到在耦合结构中改变传播超模的电磁场分布的尺寸的折射率或不准确度的不均匀性的风险,提出了作用于传播指数的值 在每个指南中使用单独的控制(通常为电气)。 由于索引的变化,单独控制,产生不同导轨之间的激光波的相位差,这些相位差对定义超音节的电磁场的组成产生反应。 通过该电气控制可以改变激光束的方向性。 该控制优选地通过放置在每个引导件附近的电极(14)实现。 引导件由诸如铌酸锂的电光材料制成,并且钕掺杂例如允许激光效应出现在引导件的内部。
    • 68. 发明授权
    • Erbium-doped fibre amplifier with shaped spectral gain
    • 具有形状光谱增益的掺铒光纤放大器
    • US5260823A
    • 1993-11-09
    • US10478
    • 1993-01-28
    • David N. PayneRichard I. LamingPaul R. MorkelMasao Tachibana
    • David N. PayneRichard I. LamingPaul R. MorkelMasao Tachibana
    • H01S3/063H01S3/067H01S3/10H04B10/17H01S3/06G02B6/26
    • H04B10/2941H01S3/10023H01S2301/04H01S3/0632H01S3/0635H01S3/0675
    • The spectral-gain characteristics of an erbium-doped fibre amplifier have been tailored by incorporating a gain-shaping-filter within the amplifier. The filter is chosen to modify the natural gain spectrum of the amplifier so as to suppress the gain peak and thus flatten the overall spectral-gain profile. Because the amplifier is distributed, it is possible to insert one or more filters along the length of the fibre. It is shown that there are considerable advantages to locating the filter within the length of the amplifier, rather than at the end, which is the more obvious choice. Advantages are that the amplifier pump efficiency is almost unaffected and the output saturation power is similar to that of the unshaped amplifier. In addition, the flat spectral gain provides an amplifier ideally-suited for use at a number of signal wavelengths, as required for wavelength-division multiplexing (WDM). The invention therefore comprises both the concept of filtering to shape the gain response of the amplifier and the recognition that this can be achieved without penalty by careful location of one or more filters along the length of the amplifier.
    • 掺铒光纤放大器的光谱增益特性已经通过在放大器内并入增益整形滤波器而被定制。 选择滤波器来修改放大器的自然增益谱,以抑制增益峰值,从而使整个频谱增益曲线变平。 因为放大器是分布式的,所以可以沿着光纤的长度插入一个或多个滤波器。 已经表明,将滤波器放置在放大器的长度内而不是结束处具有相当大的优点,这是更明显的选择。 优点是放大器泵效率几乎不受影响,输出饱和功率类似于未放大的放大器。 另外,平坦频谱增益提供了理想地适用于波分复用(WDM)所需的多个信号波长的放大器。 因此,本发明包括滤波以形成放大器的增益响应的概念以及通过沿放大器的长度仔细定位一个或多个滤波器可以实现这一点的识别。