ʻO ka bandwidth a me ka pane ʻana o ka photodetector

ʻO ka bandwidth a me ke kuleana omea ʻike kiʻi
I ke koho ʻanaMea ʻike kiʻi InGaAs, makemake nā mea a pau i nā kikoʻī like: bandwidth ma luna o 10 GHz a me ka responsivity ma luna o 0.9 A/W. Ma hope o ka nānā ʻana i ka manual data, ua ʻike au ʻaʻole ʻike ʻia kēia mau helu ʻelua ma ka hāmeʻa like. ʻO ka pane bandwidth kiʻekiʻe he 0.5 A/W wale nō a i ʻole haʻahaʻa, a ʻo ka bandwidth pane kiʻekiʻe he mau haneli MHz wale nō. ʻAʻole kēia he pilikia loea me ka mea hana - ʻo ka bandwidth a me ka pane ʻana he kūʻē maoli i ka physics, a ʻaʻole hiki iā ʻoe ke loaʻa i nā ʻaoʻao ʻelua.
ʻO ka bandwidth a me ka responsivity he kū'ē kino kūlohelohe, i hoʻokumu ʻia i loko o ka palena koʻikoʻi o ka mānoanoa o ka papa absorption. ʻO ka hoʻonui ʻana i ka mānoanoa o ka papa absorption hiki ke hoʻomaikaʻi i ka pono quantum (no laila e hoʻonui ai i ka responsivity), akā e hoʻolōʻihi ia i ka manawa transit o nā mea lawe ukana (no laila e hōʻemi ana i ka bandwidth); ʻO ka hope. No laila, i ka hoʻolālā ʻana o ka photodetector PIN maʻamau, ʻaʻole hiki ke hoʻokō ʻia nā mea ʻelua i ka manawa like a pono e hana i kahi ʻaelike.
Hoʻolālā holomua o ka ʻoihana:
Hoʻolauna ka ʻatikala i ʻekolu mau hoʻonā ʻenehana kiʻekiʻe e manaʻo ana e uhaki i kēia kūʻē:
Mea ʻike ʻano Waveguide (WGPD): Hoʻokaʻawale i ke kuhikuhi hoʻolaha o ka mālamalama mai ke kuhikuhi drift o nā mea lawe ukana, a hiki ke hoʻokō i ka bandwidth kiʻekiʻe (>40 GHz) a me ka responsivity kiʻekiʻe (>0.9 A/W) i ka manawa like, akā he paʻakikī ke kaʻina hana a he kiʻekiʻe ke kumukūʻai.
ʻO ka mea ʻike kiʻi lawe lawe Unidirectional (UTC-PD): Ke hoʻohana nei i nā electrons wikiwiki kiʻekiʻe wale nō no ka drift, e hoʻopau ana i ka palena manawa transit o nā lua wikiwiki haʻahaʻa, hiki iā ia ke hoʻokō i ka bandwidth kiʻekiʻe loa (>100 GHz) a hoʻohana pinepine ʻia i ke kamaʻilio wikiwiki a me nā kahua terahertz.
ʻO ka photodetector i hoʻonui ʻia i ka lua resonant (RCE): Ke hoʻohana nei i kahi lua resonant optical e hoʻonui i ka omo ʻana o ka mālamalama i loko o kahi papa omo lahilahi, hiki iā ia ke hoʻomaikaʻi i ka pono quantum me ka mālama ʻana i ka bandwidth kiʻekiʻe, akā he haiki loa ka bandwidth hana (spectral range).
Nā manaʻo no ke koho ʻana i ka papahana:
E wehewehe i ke koʻikoʻi o nā koi: ʻO ka mea mua, e hoʻoholo i ka koi bandwidth haʻahaʻa loa no ka photodetector e pili ana i ka bandwidth hōʻailona ʻōnaehana (me ka palena o 3 mau manawa), a laila koho i ke kumu hoʻohālike me ka pane kiʻekiʻe loa ma lalo o kēia kūlana.
E hoʻolohe i nā anakahi pae ʻōnaehana: I ka loiloi ʻana i ka photodetector, pono e uku ʻia ka mana like o ka walaʻau (NEP) a me ka ʻike o ka ʻōnaehana, ʻaʻole wale ka pane ʻana, no ka mea, hiki i ka pane kiʻekiʻe ke hele pū me ka walaʻau kiʻekiʻe.
E noʻonoʻoMea ʻike kiʻi APDi nā hiʻohiʻona mana haʻahaʻa: Ke haʻahaʻa loa ka mana o ke kukui hanana (e like me <-30 dBm), hiki ke hoʻohana ʻia ka loaʻa kūloko o ka photodiode avalanche (APD photodetector) e uku no ka nele o ka pane ʻana, akā pono e uku ʻia ka makaʻala i kona walaʻau keu.
Ke koho ʻana i ka WGPD me nā koi kiʻekiʻe a me ke kālā kiʻekiʻe: Ke koi ka ʻōnaehana i ka bandwidth kiʻekiʻe (>20 GHz) a me ka pane kiʻekiʻe (>0.8 A/W), ʻaʻole hiki i nā mea ʻike PIN maʻamau ke hoʻokō i nā koi, a pono e noʻonoʻo pololei ʻia nā mea ʻike ʻano waveguide (WGPD).
Hopena:
ʻO ke kālepa ʻana o ka bandwidth responsivity o ke kūlana maʻamauMea ʻike kiʻi PINhe palena kino kūlohelohe ia. No ka uhaki maoli ʻana iā ia, pono ka hana hou i ke ʻano o ka hāmeʻa e hoʻokaʻawale kino i ke ala omo mālamalama mai ke ala transit mea lawe. Loaʻa i nā hoʻonā kiʻekiʻe ka hana maikaʻi loa akā kiʻekiʻe nā kumukūʻai, no laila i ka hana ʻenekinia, pono nō e hana i kahi kuʻikahi ma waena o nā hiʻohiʻona noi kikoʻī, nā koi hana, a me nā kālā.