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公开(公告)号：EP0779689A2
公开(公告)日：1997-06-18
申请号：EP96308900.8
申请日：1996-12-09
IPC分类号： H01S3/131
CPC分类号： H01S3/1302 , G02B6/2932 , H01S3/0675
摘要： The gain provided by an erbium amplifier (3) is stabilised by spectrally selective optical feedback (4, 5) to make the amplifier lase. The resulting laser emission is extracted from the amplifier output using a Mach Zehnder (8, 9, 10, 11) with matched Bragg reflectors (12, 13) in its two interference arms. The extracted light may be used for supervisory purposes. Part of the laser cavity defining feedback may be provided by the Mach Zehnder by arranging one of its Bragg reflectors to be displaced with respect to the other.
摘要翻译： 由铒放大器（3）提供的增益通过光谱选择性光学反馈（4,5）来稳定，以使放大器发光。 使用在其两个干涉臂中具有匹配的布拉格反射器（12,13）的马赫曾德（8,9,10,11）从放大器输出中提取所得到的激光发射。 提取的光可以用于监督目的。 限定反馈的激光腔的一部分可以由马赫曾德尔（Mach Zehnder）提供，其中布拉格反射器之一相对于彼此移位。
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公开(公告)号：EP0485100A3
公开(公告)日：1993-01-20
申请号：EP91309978.4
申请日：1991-10-29
CPC分类号： H01S3/302
摘要： A practical fibre Raman amplifier for soliton systems which employs conventional transmission fibre (4) and a pulsed pump source (3). The pump source only requires a relatively low mean power level but must be capable of providing sufficiently high peak output power pulses at intervals corresponding to the intervals between solitons whereby to amplify the latter. A conventional mode-locked laser diode source can achieve this at the requisite wavelength. The use of such a pulsed pump source is possible since the solitons have to be spaced at intervals approximately 8 to 10 times their pulse width in order to avoid interaction problems. Conventionally, Raman amplification requires high mean power continuous wave pump sources and suitable laser diode sources are not available at the requisite wavelengths.
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公开(公告)号：EP0485100A2
公开(公告)日：1992-05-13
申请号：EP91309978.4
申请日：1991-10-29
CPC分类号： H01S3/302
摘要： A practical fibre Raman amplifier for soliton systems which employs conventional transmission fibre (4) and a pulsed pump source (3). The pump source only requires a relatively low mean power level but must be capable of providing sufficiently high peak output power pulses at intervals corresponding to the intervals between solitons whereby to amplify the latter. A conventional mode-locked laser diode source can achieve this at the requisite wavelength. The use of such a pulsed pump source is possible since the solitons have to be spaced at intervals approximately 8 to 10 times their pulse width in order to avoid interaction problems. Conventionally, Raman amplification requires high mean power continuous wave pump sources and suitable laser diode sources are not available at the requisite wavelengths.
摘要翻译： 采用传统传输光纤（4）和脉冲泵浦源（3）的实用光纤拉曼放大器。 泵浦源只需要相对较低的平均功率电平，但必须能够以对应于孤子间隔的间隔提供足够高的峰值输出功率脉冲，由此放大后者。 传统的锁模激光二极管光源可以在必要的波长上实现这一点。 使用这种脉冲泵浦源是可能的，因为孤子必须以大约其脉冲宽度的8至10倍的间隔隔开，以避免相互作用问题。 常规地，拉曼放大需要高平均功率连续波泵浦源，并且合适的激光二极管源在所需波长处不可用。
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5.发明公开Writing bragg reflection gratings in optical waveguides 有权Lichtwellenleitern的Verfahren zum Schreiben von Bragg-Reflexionsgittern
公开(公告)号：EP0903597A2
公开(公告)日：1999-03-24
申请号：EP98307083.0
申请日：1998-09-03
IPC分类号： G02B6/16
CPC分类号： G03F7/70066 , G02B6/02138 , G02B6/02152
摘要： Instead of a single beam (10), two coherent beams (10' and 10") of light are used to illuminate a phase grating in spatially separated zones for writing a Bragg reflection grating in an underlying optical (fibre) waveguide (12). Close proximity between phase grating and waveguide is not required. This facilitates the use of masking so that only two different diffracted orders (10'c and 10"a) contribute to the fringe pattern that generates the Bragg grating, thereby improving fringe contrast and reducing the deleterious spectral effects upon the reflectivity of the Bragg reflector occasioned by the presence of stitch errors in the phase grating.
摘要翻译： 代替单个光束（10），使用两个相干光束（10'和10“）来照射空间分离的区域中的相位光栅，用于在下面的光（光纤）波导（12）中写入布拉格反射光栅。 不需要相位光栅和波导之间的紧密接近，这有助于使用掩模，使得只有两个不同的衍射级（10'c和10“a）有助于产生布拉格光栅的条纹图案，从而改善条纹对比度并减少 对相位光栅中存在针迹误差引起的布拉格反射体反射率的有害光谱效应。
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公开(公告)号：EP0395277B1
公开(公告)日：1995-01-11
申请号：EP90303989.9
申请日：1990-04-12
CPC分类号： H04B10/2931 , H01S3/06754 , H01S3/094003 , H01S3/1301 , H01S3/1302 , H01S5/041 , H01S5/0683 , H01S5/50 , H04B10/2912
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公开(公告)号：EP0485101A3
公开(公告)日：1993-03-31
申请号：EP91309979.2
申请日：1991-10-29
CPC分类号： H04B10/291 , H01S3/06745 , H01S3/06754 , H01S2301/085 , H04B10/25077 , H04B10/2912
摘要： In order to achieve increased spacing between amplifiers in soliton transmission systems, it is proposed to use distributed amplifiers, whereby the fibre is a continuous amplifier, rather than or in addition to the conventional lumped amplifiers. This is achieved by using rare earth, for example, erbium doped fibre as the or part of the transmission fibre (4; 4, 7) for the solitons and arranging that the erbium doped fibre appears substantially lossless to input soliton pulses. The latter can be achieved by varying the erbium concentration along the fibre length and providing appropriate optical pumping (5) for the erbium doped fibre. Alternatively, the output of the pump (5) for the fibre can itself be pumped (5a) whereby to replenish the pump power lost to the erbium doped fibre.
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公开(公告)号：EP0485101A2
公开(公告)日：1992-05-13
申请号：EP91309979.2
申请日：1991-10-29
CPC分类号： H04B10/291 , H01S3/06745 , H01S3/06754 , H01S2301/085 , H04B10/25077 , H04B10/2912
摘要： In order to achieve increased spacing between amplifiers in soliton transmission systems, it is proposed to use distributed amplifiers, whereby the fibre is a continuous amplifier, rather than or in addition to the conventional lumped amplifiers. This is achieved by using rare earth, for example, erbium doped fibre as the or part of the transmission fibre (4; 4, 7) for the solitons and arranging that the erbium doped fibre appears substantially lossless to input soliton pulses. The latter can be achieved by varying the erbium concentration along the fibre length and providing appropriate optical pumping (5) for the erbium doped fibre. Alternatively, the output of the pump (5) for the fibre can itself be pumped (5a) whereby to replenish the pump power lost to the erbium doped fibre.
摘要翻译： 为了在孤子传输系统中实现放大器之间的间隔增加，提出使用分布式放大器，由此光纤是连续放大器，而不是传统的集总放大器，也可以除了传统的集总放大器之外。 这是通过使用稀土，例如掺铒光纤作为用于孤子的传输光纤（4; 4，7）的一部分，并且布置掺铒光纤显示出无损输入孤子脉冲。 后者可以通过沿着光纤长度改变铒浓度并为掺铒光纤提供适当的光学泵浦（5）来实现。 或者，用于纤维的泵（5）的输出本身可被泵送（5a），从而补充铒掺杂光纤损失的泵浦功率。
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公开(公告)号：EP0779689A3
公开(公告)日：1998-04-01
申请号：EP96308900.8
申请日：1996-12-09
IPC分类号： H01S3/131
CPC分类号： H01S3/1302 , G02B6/2932 , H01S3/0675
摘要： The gain provided by an erbium amplifier (3) is stabilised by spectrally selective optical feedback (4, 5) to make the amplifier lase. The resulting laser emission is extracted from the amplifier output using a Mach Zehnder (8, 9, 10, 11) with matched Bragg reflectors (12, 13) in its two interference arms. The extracted light may be used for supervisory purposes. Part of the laser cavity defining feedback may be provided by the Mach Zehnder by arranging one of its Bragg reflectors to be displaced with respect to the other.
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公开(公告)号：EP0559356A1
公开(公告)日：1993-09-08
申请号：EP93301208.0
申请日：1993-02-18
CPC分类号： H04B10/2941 , H01S3/06725 , H01S3/0675 , H01S3/10023 , H01S3/2333 , H01S2301/04 , H04B10/2912
摘要： An optical repeater is comprised by an amplifying optical fibre (5) and directional coupler means (3). An input pulse (1) is reflected, by a respective grating (7) written in the optical fibre, in dependence on the spectral content of the pulse (1). The output pulse (8) is thus reshaped (amplified) and narrowed spectrally. The gratings have different spacings, at least in use of the repeater, so that output pulses with predetermined characteristics can be achieved.
摘要翻译： 光中继器由放大光纤（5）和定向耦合器（3）组成。 根据脉冲（1）的光谱含量，通过写在光纤中的相应光栅（7）反射输入脉冲（1）。 因此，输出脉冲（8）被重新形成（放大）并且频谱变窄。 至少在使用中继器时，光栅具有不同的间隔，使得可以实现具有预定特性的输出脉冲。
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