Optical fiber attenuation is one of the main factors that affect the transmission performance of optical fiber, also known as optical loss, that is, the attenuation or loss of optical signal after a certain distance transmission in optical fiber. The attenuation degree of optical signal can be determined by testing insertion loss and echo reflection. By testing the optical fiber, we can know where the optical signal begins to decay. Many factors will cause the accelerated attenuation of optical signal, such as the physical characteristics of the optical fiber, the end face pollution of the optical fiber connector, the fusion and termination of the optical fiber, etc., so we usually use the optical power meter and light source, the optical multimeter (the aggregation of the optical power meter and light source), or the optical time domain reflectometer and the hand-held optical power meter To measure the attenuation of the light signal.
Portlarning turlariga ko'ra, tez-tez ishlatiladigan optik tolali attenuatorlar quyidagicha tasniflanadi:
SC optik tolali attenuator
SC optik tolali interfeysga qo'llanganda, u RJ-45 interfeysiga juda o'xshaydi, ammo SC interfeysi yanada tekisroq. Aniq farq ichki aloqadir. Agar bu 8 ta mis mis kontaktlari bo'lsa, bu RJ-45 interfeysi. Agar bu mis ustun bo'lsa, bu SC optik tolali interfeys.
LC optik tolali attenuator
SFP modulining ulagichini ulash uchun LC optik tolali interfeysda ishlatiladi. U modulli razvedka (RJ) mandal mexanizmidan ishlab chiqarilgan, uni ishlatish oson. (routerlarda tez-tez ishlatiladi)
FC optik attenuator
FC optik tolali interfeysi uchun tashqi mustahkamlash usuli metall qisma, mahkamlash usuli esa vintli qisqichdir. Odatda, u ODF tomonida ishlatiladi (eng ko'p tarqatish ramkasida ishlatiladi).
ST tolali attenuator
Odatda optik tolali tarqatish ramkasida ishlatiladigan St optik tolali interfeysda ishlatiladi. Qobiq yumaloq va mahkamlash usuli - vintli qisqich.
