公开(公告)号：US06707957B1

公开(公告)日：2004-03-16

申请号：US10024996

申请日：2001-12-18

Applicant: Andrew L Reynolds ,  Sotiris E Kanellopoulos ,  Vincent Handerek

Inventor： Andrew L Reynolds ,  Sotiris E Kanellopoulos ,  Vincent Handerek

IPC: G02B627

CPC classification number: G02B6/02109 ,  G02B6/021 ,  G02B6/02338 ,  G02B6/02357 ,  G02B6/02371 ,  G02B6/02376 ,  G02B6/105 ,  G02B6/274 ,  G02B6/278 ,  H04B10/2572

Abstract: Compensating for polarization mode dispersion in a birefringent optical transmission fibre is achieved by controlling the birefringence of the fibre. The difference in group velocity of the orthogonal polarization states of an optical signal transmitted over the fibre is monitored to generate an error signal representing the difference. The birefringence of the fibre is adjusted accordingly to minimize the difference and thereby provide dynamic compensation. Birefringence control may be achieved by a non-linear fibre grating written into the fibre to impose a differential time delay. The fibre may be a side hole fibre (SHF), a holey fibre (HF), a photonic crystal fibre (PCF), or any other suitable microstructure fibre. The fibre may have stressing rods, may be tapered along its length and may be controlled electrically, mechanically, acoustically or thermally by spaced heating elements.

Abstract translation: 通过控制纤维的双折射来实现双折射光传输光纤中的偏振模色散的补偿。 监测通过光纤传输的光信号的正交偏振状态的组速度差异，以产生表示差的误差信号。 相应地调节纤维的双折射以使差异最小化，从而提供动态补偿。 双折射控制可以通过写入光纤中的非线性光纤光栅实现，以施加差分时间延迟。 纤维可以是侧孔纤维（SHF），多孔纤维（HF），光子晶体纤维（PCF）或任何其它合适的微结构纤维。 纤维可以具有应力杆，其可以沿着其长度成锥形，并且可以通过间隔开的加热元件电，机械，声学或热控制。

公开(公告)号：US06526192B2

公开(公告)日：2003-02-25

申请号：US09747690

申请日：2000-12-22

Applicant: Andrew V Maroney ,  Vincent Handerek ,  Kevin J Cordina

Inventor： Andrew V Maroney ,  Vincent Handerek ,  Kevin J Cordina

IPC: G02B626

CPC classification number: H04J14/02 ,  G02B6/264

Abstract: An optical component for halting the propagation of a fiber fuse through a transmission fiber has a threshold power level which is greater than the transmission power level of the system for that transmission fiber. The component comprises a fiber which is selected such that it is unable to propagate a fiber fuse when the power is below the threshold power level. The component is designed by selecting values of the core diameter and the higher mode cutoff wavelength of the fiber making up the component. If power surges are experienced which exceed the transmission power level (the transmission fiber being designed to operate at the transmission power levels without fiber fuses being initiated) then the component provide a safety margin.