受激布里渊与拉曼散射在光纤通信中各扮演什么角色?
What roles do stimulated Brillouin and Raman scattering play in fiber communication?
布里渊散射是声波调制的窄带非线性,可用于传感与慢光;拉曼散射是光学声子交换,被用来做分布式放大(拉曼放大器)延展传输距离。
Brillouin scattering is a narrowband acoustic nonlinearity useful for sensing and slow light; Raman scattering exchanges optical phonons and powers distributed Raman amplifiers that extend reach.
难度 专业 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
Agrawal,《非线性光纤光学》(第5版)
Agrawal, 'Nonlinear Fiber Optics' (5th ed.)
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL2629338W:Nonlinear fiber optics(
#布里渊 #拉曼 #非线性
为什么光纤通信不怕“信号串台”?
Why doesn't fiber communication suffer from crosstalk?
每根光纤靠全反射把光锁在纤芯里,光几乎不外泄;不同波长还能复用在一根纤里(波分复用),像多条车道并行不扰。
Total internal reflection traps light in the core so it barely leaks; different wavelengths can share one fiber via multiplexing, like separate lanes that don't interfere.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Kao 与 Hockham,《用于光频的介电光纤表面波导》,Proceedings of the IEE 113 (1966)
Kao & Hockham, 'Dielectric-fibre Surface Waveguides for Optical Frequencies', Proceedings of the IEE 113 (1966)
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1049/piee.1966.0189:Dielectric-fibre surf
#全反射 #波分复用 #光纤
光纤的“色散”和“非线性”为什么会限制网速?
How do dispersion and nonlinearity limit fiber speed?
不同波长光速略不同(色散)会让脉冲展宽互相重叠;强光还会引发非线性效应改变波形。工程师用特殊光纤和编码抵消它们以提速。
Wavelengths travel at slightly different speeds (dispersion), broadening pulses; strong light also triggers nonlinear effects. Special fibers and coding counteract both to raise speed.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
Agrawal,《非线性光纤光学》(第5版)
Agrawal, 'Nonlinear Fiber Optics' (5th ed.)
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL2629338W:Nonlinear fiber optics(
#色散 #非线性 #通信极限
光子晶体光纤和普通的有什么不同?
How does a photonic-crystal fiber differ from a normal one?
它用周期性微结构(而非单纯折射率差)导光,可做成中空或超大纤芯、反常色散,用于超连续谱、低损耗传感和新型激光器。
It guides light with a periodic microstructure instead of mere index contrast, enabling hollow or huge cores and odd dispersion for supercontinuum, sensing and new lasers.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注:著录含书名,但缺版次 / 出版社 / 年份中的一部分,需编辑补全后才能做独立比对。
Russell,《光子晶体光纤》,Science 299 (2003)
Russell, 'Photonic Crystal Fibers', Science 299 (2003)
#光子晶体光纤 #微结构 #色散
海底光缆怎么把网速传遍全世界?
How do undersea cables spread the internet worldwide?
头发丝细的玻璃丝用光来传信息,光几乎不衰减,一根就能同时打很多电话、看很多视频。
Thin glass strands carry data as light with little loss, so one fiber can carry countless calls and videos at once.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Kao 与 Hockham,《用于光频的介电光纤表面波导》,Proceedings of the IEE 113 (1966)
Kao & Hockham, 'Dielectric-fibre Surface Waveguides for Optical Frequencies', Proceedings of the IEE 113 (1966)
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.1049/piee.1966.0189:Dielectric-fibre surf
#光纤 #通信 #光