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    • 7. 发明授权
    • Pump wavelength tuning of optical amplifiers and use of same in
wavelength division multiplexed systems
    • 泵浦波长调谐光放大器及其在波分复用系统中的应用
    • US6144486A
    • 2000-11-07
    • US16184
    • 1998-01-30
    • Kevin W. BennettFiona DavisRichard A. HabelPaul A. JakobsonNigel E. JolleyRobert W. KeysKim Byron RobertsMark A. NewhouseMichael J. Yadlowsky
    • Kevin W. BennettFiona DavisRichard A. HabelPaul A. JakobsonNigel E. JolleyRobert W. KeysKim Byron RobertsMark A. NewhouseMichael J. Yadlowsky
    • H01S3/094H01S3/13H01S3/131H01S5/0687H01S5/50H01S3/00
    • H01S3/094003H01S5/0687H01S2301/04H01S3/06754H01S3/09415H01S3/1301H01S5/0617H01S5/06804H01S5/50
    • The variables and parameters previously understood to affect the gain spectrum of an optical amplifier 13 were: (1) the wavelengths to be amplified; (2) the input power levels at those wavelengths; (3) the characteristics of the amplifying medium 20; (4) the insertion loss spectra of the amplifier's components, including any filter(s) used for gain flattening; (5) the pump band chosen to pump the amplifying medium 20; and (6) the total amount of pump power supplied in the chosen pump band. An additional fundamental variable has been identified which can be used to control the gain spectrum of an optical amplifier 13, namely, the center wavelength of the spectrum of the pump's output power within the chosen pump band. Methods and apparatus for using this variable for this purpose are disclosed.For example a, transmission system is disclosed having a transmitter 11 and a receiver 10 connected by an optical fiber 12. A plurality of optical amplifiers 13 are located along the optical fiber 12 to amplify signal channels between the transmitter and receiver. Each of the amplifiers has a pump light source 21, the wavelength of which is such that contributions to differential gain due to pump light wavelength related effects is substantially reduced.Also disclosed is a WDM transmission system having a transmission path including a concatenation of laser diode pumped optical amplifiers 13 wherein the gain spectrum of an amplifier is controlled at least in part by a feedback loop regulating the temperature of its laser diode pump 21. The feedback loop may for instance derive its control signal from a measure of the drive current applied to the pump, of the emission wavelength of the pump, or of the disparity between the power output from the amplifier in one of the multiplexed signal channels and that from at least one other of the channels.
    • 以前被理解为影响光放大器13的增益谱的变量和参数是:(1)待放大的波长; (2)这些波长的输入功率电平; (3)放大介质20的特性; (4)放大器组件的插入损耗谱,包括用于增益平坦化的任何滤波器; (5)选择泵送放大介质20的泵浦带; 和(6)在所选泵浦带中供应的泵功率的总量。 已经确定了可以用于控制光放大器13的增益谱的附加基本变量,即所选择的泵浦波段内的泵的输出功率的频谱的中心波长。 公开了用于该目的的该变量的方法和装置。 例如,公开了具有由光纤12连接的发射机11和接收机10的传输系统。沿着光纤12定位多个光放大器13以放大发射机和接收机之间的信号信道。 每个放大器具有泵浦光源21,其波长使得由于泵浦光波长相关效应而对差分增益的贡献显着降低。 还公开了一种WDM传输系统,其具有包括激光二极管泵浦光放大器13的级联的传输路径,其中放大器的增益谱至少部分地通过调节其激光二极管泵21的温度的反馈回路来控制。反馈 循环可以例如从施加到泵的驱动电流,泵的发射波长的量度或者在多路复用的信号通道中的放大器输出的功率与从 至少另外一个渠道。
    • 9. 发明授权
    • Ga- and/or In-containing AsGe sulfide glasses
    • 含Ga和/或In含量的AsGe硫化物玻璃
    • US5389584A
    • 1995-02-14
    • US225766
    • 1994-04-11
    • Bruce G. AitkenMark A. Newhouse
    • Bruce G. AitkenMark A. Newhouse
    • C03C3/32C03C4/10
    • C03C3/321C03C3/323C03C4/10C03C4/12Y10S501/904
    • This invention is directed to the production of transparent glasses exhibiting excellent transmission far into the infrared region of the electromagnetic radiation spectrum, said glasses consisting essentially, expressed in terms of mole percent on the sulfide basis, of 55-95% GeS.sub.2, 2-40% As.sub.2 S.sub.3, 0.01-20% R.sub.2 S.sub.3, wherein R is at least one trivalent network forming cation selected from the group consisting of gallium and indium, 0-10% MS.sub.x, wherein M is at least one modifying cation selected from the group consisting of aluminum, barium, cadmium, calcium, lead, lithium, mercury, potassium, silver, sodium, strontium, thallium, tin, yttrium, and a rare earth metal of the lanthanide series, 0-20% total of at least one halide selected from the group consisting of chloride and fluoride, 0-5% total selenide, and wherein the sulfur and/or selenium content can vary between 85-125% of the stoichiometric value. The difference between the temperature of the onset of crystallization and the transition temperature of the glasses is at least 150.degree. C. and commonly will be greater than 200.degree. C.
    • 本发明涉及生产透过远离电磁辐射光谱的红外区域的透射性优异的透明玻璃,所述玻璃基本上以硫化物摩尔百分数表示55-95%GeS2,2-40 %As 2 S 3,0.01-20%R 2 S 3,其中R是选自由镓和铟组成的组中的至少一种三价网络形成的阳离子,0-10%的MS x,其中M是至少一种选自铝的修饰阳离子 ,钡,镉,钙,铅,锂,汞,钾,银,钠,锶,铊,锡,钇和镧系稀土金属,0-20%的至少一种选自 由氯化物和氟化物组成的组,0-5%的硒化物,其中硫和/或硒含量可以在化学计量值的85-125%之间变化。 结晶开始的温度与玻璃的转变温度之间的差异至少为150℃,通常将大于200℃。
    • 10. 再颁专利
    • Fiber amplifier with one single mode core having modified gain spectrum
    • 具有一个单模核心的光纤放大器具有修改的增益谱
    • USRE41438E1
    • 2010-07-13
    • US09105572
    • 1998-06-26
    • Douglas W. HallMark A. Newhouse
    • Douglas W. HallMark A. Newhouse
    • G02B6/00G02B6/22
    • H01S3/10023H01S3/06766H01S3/06787H01S3/1608H01S2301/04
    • Disclosed is a fiber amplifier system including a gain fiber having a single-mode core containing dopant ions capable of producing stimulated emission of light at wavelength λs when pumped with light of wavelength λp. Absorbing ion filtering means is operatively associated with the gain fiber to alter the gain curve. If the absorbing ions are the same as the gain ions of the gain fiber, the system further includes means for preventing pump light from exciting the gain ions of the filtering means. The excitation prevention means may take the form of means for attenuating pump light. If the absorbing ions are different from the dopant ions of the gain fiber, such absorbing ions can be subjected to light at wavelength αp, but they will remain unexcited. Such absorbing ions can be used to co-dope the gain fiber, or they can be incorporated into the core of a fiber that is in series with the gain fiber.
    • 公开了一种光纤放大器系统,其包括具有单模核心的增益光纤,所述单模核心包含掺杂离子,当用波长λp的光泵浦时,能够产生波长λs的受激发射的光。 吸收离子过滤装置可操作地与增益光纤相关联以改变增益曲线。 如果吸收离子与增益光纤的增益离子相同,则系统还包括用于防止泵浦光激发过滤装置的增益离子的装置。 励磁防止装置可以采取用于衰减泵浦光的装置的形式。 如果吸收离子与增益纤维的掺杂剂离子不同,这样的吸收离子可以经受波长αp的光,但是它们将保持不变。 这种吸收离子可以用于共增益纤维,或者它们可以并入到与增益纤维串联的纤维的芯中。