ʻO ka mea mua, ka ʻike kumu o ka module optical
1.Definition o optical module:
Optical module: ʻo ia hoʻi, ka module transceiver optical.
2. ʻO ke ʻano o ka module optical:
Hoʻokumu ʻia ka module transceiver optical me kahi mea optoelectronic, kahi kaapuni hana a me kahi interface optical, a ʻo ka mea optoelectronic nā ʻāpana ʻelua: ka hoʻouna ʻana a me ka loaʻa.
ʻO ka ʻāpana hoʻouna: ʻo kahi hōʻailona uila e hoʻokomo ana i kahi helu code e hana ʻia e kahi pahu hoʻokele kūloko e hoʻokele i kahi laser semiconductor (LD) a i ʻole kahi kukui emitting diode (LED) e hoʻokuʻu i kahi hōʻailona kukui modulated o ka helu kūpono, a me kahi optical optical. ʻO ka mana kaapuni ʻakomi i hoʻolako ʻia i loko. Paʻa mau ka mana hōʻailona optical.
ʻO ka ʻāpana i loaʻa: ua hoʻololi ʻia kahi module hoʻokomo hōʻailona optical o kekahi helu helu helu i hōʻailona uila e ka diode photodetecting. Ma hope o ka preamplifier, hoʻopuka ʻia ka hōʻailona uila o ka helu helu helu pili, a ʻo ka hōʻailona puka ka pae PECL maʻamau. I ka manawa like, hoʻopuka ʻia kahi hōʻailona hōʻailona ma hope o ka emi ʻana o ka mana optical input ma mua o kahi waiwai.
3. ʻO nā palena a me ke koʻikoʻi o ka module optical
Loaʻa i nā modula Optical nā ʻāpana ʻenehana optoelectronic koʻikoʻi. Eia nō naʻe, no nā modula optical hot-swappable ʻelua, ʻo GBIC a me SFP, ʻo nā ʻāpana ʻekolu e hopohopo nui nei i ke koho ʻana:
Loʻihi nalu waena
I nā nanometers (nm), ʻekolu mau ʻano nui i kēia manawa:
850nm (MM, multimode, kumu kūʻai haʻahaʻa akā pōkole ka mamao o ka lawe ʻana, maʻamau 500M wale nō); 1310nm (SM, hoʻokahi ʻano, nui ka poho i ka wā o ka lawe ʻana akā liʻiliʻi liʻiliʻi, hoʻohana maʻamau no ka hoʻouna ʻana i loko o 40KM);
1550nm (SM, hoʻokahi ʻano, haʻahaʻa haʻahaʻa i ka wā o ka hoʻouna ʻana akā hoʻopuehu nui, hoʻohana maʻamau no ka lawe lōʻihi ma luna o 40KM, a hiki ke hoʻouna pololei iā 120KM me ka ʻole o ka relay);
Laki hoʻouna
Ka helu o nā bits (bits) o ka ʻikepili i hoʻouna ʻia i kēlā me kēia kekona, ma bps.
ʻEhā mau ʻano i hoʻohana mau ʻia i kēia manawa: 155 Mbps, 1.25 Gbps, 2.5 Gbps, 10 Gbps, a me nā mea like. ʻO ka nui o ka hoʻouna ʻana ua kūpono i hope. No laila, ua kapa ʻia ka 155M optical module i ka FE (100 Mbps) optical module, a ʻo ka 1.25G optical module i kapa ʻia ʻo GE (Gigabit) optical module. ʻO kēia ka module i hoʻohana nui ʻia i nā lako uila optical. Eia kekahi, ʻo kāna helu hoʻouna i nā ʻōnaehana mālama fiber (SAN) ʻo 2Gbps, 4Gbps a me 8Gbps.
Ka mamao hoʻouna
ʻAʻole pono e hoʻokuʻu ʻia ka hōʻailona optical i kahi mamao e hiki ke hoʻouna pololei ʻia, i nā kilomika (i kapa ʻia ʻo kilomika, km). Loaʻa i nā modula Optical nā kikoʻī penei: multimode 550m, hoʻokahi mode 15km, 40km, 80km, a me 120km, a pēlā aku.
ʻO ka lua, ka manaʻo kumu o nā modules optical
1.Laser waeʻano
ʻO ka laser ka mea nui loa o kahi module optical e hoʻokomo i kēia manawa i loko o kahi mea semiconductor a hoʻokuʻu i ke kukui laser ma o nā oscillations photon a me nā loaʻa i loko o ka lua. I kēia manawa, ʻo nā lasers i hoʻohana pinepine ʻia ʻo FP a me DFB lasers. ʻO ka ʻokoʻa, ʻokoʻa ka mea semiconductor a me ke ʻano o ka lua. ʻOi aku ka maikaʻi o ke kumukūʻai o ka laser DFB ma mua o ka laser FP. ʻO nā modules Optical me ka mamao o ka lawe ʻana a hiki i 40KM maʻamau e hoʻohana i nā lasers FP. ʻO nā modules Optical me nā mamao hoʻouna.≥Hoʻohana pinepine ʻo 40KM i nā lasers DFB.
2.Transmitted ka mana optical a me ka loaʻa ʻana o ka naʻau
ʻO ka mana optical i hoʻouna ʻia e pili ana i ka mana optical output o ke kumu kukui ma ka hopena hoʻouna o ka module optical. ʻO ka naʻau o ka loaʻa ʻana e pili ana i ka liʻiliʻi loa i loaʻa i ka mana optical o ka module optical ma kahi kikoʻī a me ka hapa hapa hapa.
ʻO nā ʻāpana o kēia mau ʻāpana ʻelua he dBm (ʻo ia hoʻi ka decibel milliwatt, ka logarithm o ka mana mana mw, ka helu helu ʻana he 10lg, 1mw ua hoʻololi ʻia i 0dBm), ka mea i hoʻohana nui ʻia e wehewehe i ka mamao o ka lawe ʻana o ka huahana, nā hawewe like ʻole, ʻOkoʻa ka mana hoʻouna a me ka loaʻa ʻana o ka naʻau o ka module optical, inā hiki ke hōʻoia ʻia ka mamao o ka lawe ʻana.
3.Loss a me ka hoopuehu
ʻO ka poho ka nalowale o ka ikehu māmā ma muli o ka absorption a me ka hoʻopuehu ʻana o ka mea waena a me ka leakage o ka mālamalama i ka wā e hoʻouna ʻia ai ke kukui i loko o ka fiber. Hoʻopau ʻia kēia ʻāpana o ka ikehu ma kekahi ʻano e like me ka piʻi ʻana o ka mamao o ka hoʻouna ʻana. ʻO ka hoʻopuehu ʻia ma muli o ka like ʻole o ka wikiwiki o nā hawewe electromagnetic o nā lōʻihi hawewe like ʻole e hoʻolaha ana i loko o ke ʻano like ʻole, ka mea e hoʻopiʻi ai i nā ʻāpana hawewe like ʻole o ka hōʻailona optical a hiki i ka ka loaʻa ʻana o ka hopena i nā manawa like ʻole ma muli o ka hōʻiliʻili ʻana o ka mamao o ka hoʻouna ʻana, ka hopena i ka hoʻonui ʻana i ka pulse a no laila hiki ʻole ke ʻike i nā hōʻailona. waiwai. Hoʻopili nui kēia mau ʻāpana ʻelua i ka mamao o ka lawe ʻana o ka module optical. Ma ke kaʻina hana noi maoli, ʻo ka 1310nm optical module e helu maʻamau i ka nalowale o ka loulou ma 0.35dBm/km, a me ka 1550nm optical module e helu maʻamau i ka nalowale o ka loulou ma .20dBm/km, a helu i ka waiwai dispersion. Paʻakikī loa, maʻamau no ka ʻike.
4. ʻO ke ola o ka module optical
Nā kūlana hoʻohui honua, 50,000 mau hola o ka hana mau, 50,000 mau hola (e like me 5 mau makahiki).
ʻO nā modula optical SFP he mau kikowaena LC āpau. ʻO nā modules optical GBIC he mau kikowaena SC āpau. ʻO nā mea hoʻopili ʻē aʻe me FC a me ST.