Pdh vs sdh describes difference between pdh and sdh


DWDM Channels Frequencies



Download 255,2 Kb.
bet8/11
Sana07.01.2022
Hajmi255,2 Kb.
#325586
1   2   3   4   5   6   7   8   9   10   11
Bog'liq
Computer Networks

DWDM Channels Frequencies


DWDM operates in the range between 1530 and 1565 nm, the so-called C-band that corresponds to the low-loss window of the optical fiber. This is the range where the Erbium-Doped Fiber Amplifier (EDFA) is operative. A grid of allowable wavelengths/frequencies of operation is per ITU-T, centered in a frequency of 193.1 THz, or a wavelength of 1553.3 nm, and all sorts of frequencies spaced at multiples of 25 GHz (=0.2 nm) around that center frequency. Commercial systems might have channels at 2.5 Gbps, 10 Gbps, and 40 Gbps (in which the latter are recently becoming commercial) in addition to combinations of these in the same system. The higher the bit rate, the larger needs from the power budget meaning that the lasers must have better signal to noise figures, the amplifier spacing needs to be reduced, amplification must be higher for example, by employing two DWDM Optical Amplifiers in series. Typically 64 DWDM channels at 10 Gbps reach a maximum distance of around 1,500 km with an amplifier spacing close to 100 km. Long-distance transmission systems beyond 1,500 km and up to 4,500 km will also be commercially available using advanced and much more expensive systems.

Download 255,2 Kb.

Do'stlaringiz bilan baham:
1   2   3   4   5   6   7   8   9   10   11




Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©hozir.org 2024
ma'muriyatiga murojaat qiling

kiriting | ro'yxatdan o'tish
    Bosh sahifa
юртда тантана
Боғда битган
Бугун юртда
Эшитганлар жилманглар
Эшитмадим деманглар
битган бодомлар
Yangiariq tumani
qitish marakazi
Raqamli texnologiyalar
ilishida muhokamadan
tasdiqqa tavsiya
tavsiya etilgan
iqtisodiyot kafedrasi
steiermarkischen landesregierung
asarlaringizni yuboring
o'zingizning asarlaringizni
Iltimos faqat
faqat o'zingizning
steierm rkischen
landesregierung fachabteilung
rkischen landesregierung
hamshira loyihasi
loyihasi mavsum
faolyatining oqibatlari
asosiy adabiyotlar
fakulteti ahborot
ahborot havfsizligi
havfsizligi kafedrasi
fanidan bo’yicha
fakulteti iqtisodiyot
boshqaruv fakulteti
chiqarishda boshqaruv
ishlab chiqarishda
iqtisodiyot fakultet
multiservis tarmoqlari
fanidan asosiy
Uzbek fanidan
mavzulari potok
asosidagi multiservis
'aliyyil a'ziym
billahil 'aliyyil
illaa billahil
quvvata illaa
falah' deganida
Kompyuter savodxonligi
bo’yicha mustaqil
'alal falah'
Hayya 'alal
'alas soloh
Hayya 'alas
mavsum boyicha


yuklab olish