Download - Pendahuluan Optik
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PENDAHULUAN
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Sejarah
• Komunikasi gerakan tangan, mata sebagai detektor dan otaksebagai prosesor
• Komunikasi dengan menggunakan asap
• Lampumengedip-kedipkan sesuai informasi yang dikirim
• 1880, Graham Bell menemukan sistem komunikasi cahayadisebut photophonemenggunakan cahaya matahari yang terpantul dari sebuah cermin tipis termodulasi voice. Di penerima cahaya matahari termodulasi itu jatuh pada cell selenium photoconducting yang langsung mengubahnyamenjadi arus listrik
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Kapel Sistina
• Asap hitam mengepul dari cerobong asap Kapel Sistina di Vatikan, yang menandakan bahwa sidang para kardinal pada hari tersebut belum berhasilmenentukan Paus baru untuk memimpin Gereja Katholik sedunia.
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Ilustrasi
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EVOLUSI KOMUNIKASI OPTIK
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Peningkatan Bit rate – Distance Product
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Perkembangan SKSO
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Peningkatan Kapasitas Gelombang Cahaya
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3 Tb/s
1 Tb/s
300 Gb/s
100 Gb/s
30 Gb/s
10 Gb/s
‘88 ‘90 ‘92 ‘94 ‘96 ‘98 ‘00
10 Tb/s
30 Tb/s
Experimental
• Wide Band OA• Non-Zero Dispersion Fiber• Forward Error Correction• Polarization Multiplexing• Optical Add/Drop
Increasing Transmission Capacity per Fiber
Lease bandwidth not fiber Source: Lucent Technologies
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Perkembangan Kapasitas Fiber
• NTT was able to achieve 69.1 Tbit/s transmission by applying wavelength division multiplex (WDM) of 432 wavelengths with a capacity of 171 Gbit/s over a single 240 km-long optical fiber on March 25, 2010.
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Kabel Laut
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World Wide Submarine FO Networks
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Sistem Kabel Laut Pasifik
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South-East Asia and the Far-East
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Perangkat Siskom Optik
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Perangkat Siskom Optik
• Optical source – Semiconductor laser or LED
• Modulator – Analog or digital – Direct modulated source or external modulator
• Set of connectors or permanent fiber splice – Join fiber lengths
• Repeater – Electronically detect and regenerate signal
• Optical amplifier – Amplify signal power
• Optical receiver (detector, preamp, logic circuits) – Recover transmitted signal
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Hal-hal Penting
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Alasan Pemilihan Fiber
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Alasan Pilihan Selain Fiber
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Spektrum Frekuensi Optik
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Spektrum Frekuensi Optik
• Optik adalah gelombang elektromagnetik dengan frekuensi yang tinggi
• Ordenya 1014 Hz
10
106
390
770
(nm)
Infrared
Cahaya
tampak
Ultraviolet80
2550
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Cahaya Tampak
• Merah 622 nm – 770 nm
• Orange 597 nm – 622 nm
• Kuning 577 nm – 597 nm
• Hijau 492 nm – 577 nm
• Biru 455 nm – 492 nm
• Violet 390 nm – 455 nm
• Ultraviolet 300 nm – 390 nm
• Infrared 770 nm – 1,5 . 103
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Spektrum Frekuensi Optik
• Window Optik – range frekuensi optik dimanaredaman serat optikpaling rendah range frekuensi ini yang digunakan sebagai carrier Window Pertama
800 - 900 nm
Window Kedua
1300 nm
Window Ketiga
1550 nm
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Spektrum Frekuensi Optik
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