ʻO ke kamaʻilio fiber Optical, ʻo ia kekahi o nā pou nui o ke kamaʻilio ʻana i kēia wā, he kuleana koʻikoʻi i nā ʻoihana kelepona hou.
Hiki ke manaʻo ʻia ke ʻano hoʻomohala o ke kamaʻilio fiber optical mai nā ʻaoʻao aʻe.
1. No ka hoʻomaopopo ʻana i ka hoʻonui ʻana i ka ʻike a me ka hoʻouna ʻana i ka lōʻihi, pono e hoʻohana ʻia ka fiber mode hoʻokahi me ka haʻahaʻa haʻahaʻa a me ka haʻahaʻa haʻahaʻa.I kēia manawa, hoʻohana nui ʻia ka fiber optical mode G.652 maʻamau i nā laina kelepona kelepona.ʻOiai he 1.55 μm ka liʻiliʻi o kēia fiber, he waiwai hoʻopuehu nui kona ma kahi o 18 ps / (nm.km).Ua ʻōlelo ʻia i ka wā e hoʻohana ʻia ai ka fiber mode-mode maʻamau i ka nalu o 1.55 μm, ʻaʻole kūpono ka hana hoʻouna.
Inā hoʻoneʻe ʻia ka lōʻihi o ka hawewe ʻeleʻele mai 1.31 μm a i 1.55 μm, ua kapa ʻia ʻo ia ka dispersion-shifted fiber (DSF), akā i ka wā e hoʻohana ʻia ai kēia fiber a me erbium-doped fiber amplifier (EDFA) i loko o kahi ʻōnaehana multiplexing wavelength (WDM) , e Ma muli o ka linearity ole o ka fiber, eha-hawewe hui 'ana, ka mea e pale i ka hoʻohana maʻamau o WDM, 'o ia hoʻi, 'aʻole maikaʻi ka dispersion zero fiber no WDM.
I mea e hoʻohana maikaʻi ʻia ai ka ʻenehana kamaʻilio fiber optical i ka ʻōnaehana WDM, pono e hoʻemi ʻia ka dispersion fiber, akā ʻaʻole ʻae ʻia ʻo ka zero.No laila, ua kapa ʻia ka fiber hoʻokahi-mode hou i kapa ʻia ʻo non-zero dispersion fiber (NZDF), mai 1.54 ~ Hiki ke mālama ʻia ka waiwai dispersion ma ka 1.56μm ma 1.0 ~ 4.0ps / (nm.km), ka mea e pale ai. ka ʻāpana hoʻopuehu ʻole, akā mālama i kahi waiwai hoʻopuehu liʻiliʻi.
Nui nā laʻana i hōʻike ʻia ma ka lehulehu me ka hoʻohana ʻana i ka ʻōnaehana hoʻouna EDFA / WDM o NZDF.
2.Photonic mea i hoʻohana 'ia i loko o ka optical fiber kama'ilio nenoai ua ulu nui i loko o nā makahiki i hala iho nei.No ka hoʻokō ʻana i nā pono o nā ʻōnaehana WDM, ua hoʻomohala ʻia nā mīkini kumu kukui uila nui (MLS) i nā makahiki i hala.Hoʻonohonoho nui ia i nā paipu laser he nui i loko o kahi ʻano a hana i kahi ʻāpana optical hybrid me kahi hui hōkū.
No ka loaʻa ʻana o ka ʻōnaehana kamaʻilio fiber optical, ua hoʻomohala nui ʻia kāna photodetector a me preamplifier i ke kuhikuhi o ka pane wikiwiki a ākea paha.Hiki i nā kiʻi kiʻi PIN ke hoʻokō i nā koi ma hope o ka hoʻomaikaʻi ʻana.No nā mea ʻike kiʻi broadband i hoʻohana ʻia i ka band 1.55μm lōʻihi-lōʻihi, ua hoʻomohala ʻia kahi pahu metala semiconductor-metal photodetection tube (MSM) i nā makahiki i hala.Kaʻahele nalu hāʻawi photodetector.Wahi a nā hōʻike, hiki i kēia MSM ke ʻike i ka 78dB o 3dB frequency bandwidth no nā hawewe māmā 1.55μm.
Hiki ke pani ʻia ka preamplifier o ka FET e kahi transistor mobility electron kiʻekiʻe (HEMT).Ua hōʻike ʻia ʻo ka 1.55μm optoelectronic receiver me ka hoʻohana ʻana i ka MSM detector a me HEMT pre-amplified optoelectronic integration (OEIC) kaʻina he 38GHz kaʻina a hiki i ka 60GHz.
3. ʻAʻole hiki ke hoʻololi i ka ʻōnaehana PDH hoʻoili kiko-i-point i ka ʻōnaehana kamaʻilio fiber optical i ka hoʻomohala ʻana i nā ʻoihana kelepona hou.No laila, ʻo ka hoʻomohala ʻana o ka kamaʻilio fiber optical e pili ana i ka ʻoihana pūnaewele ua lilo i mea hiki ʻole ke pale ʻia.
ʻO SDH kahi kumukānāwai pūnaewele hoʻouna hou me nā ʻano kumu o ka pūnaewele.He pūnaewele ʻike piha ia e hoʻohui i ka multiplexing, ka hoʻouna laina a me nā hana hoʻololi a loaʻa iā ia nā mana hoʻokele pūnaewele ikaika.Ke hoʻohana nui ʻia nei i kēia manawa.