Sistem Kom Optik

Example of a laser diode. (Ref.: Infineon) Evolution of Lightwave systems 2nd Generation: The repeater spacing could be increased by operating the lig...

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21/09/2012

Sistem Kom Optik - Pengantar Anhar, ST., MT.

Kontrak Kuliah Nama Mata Kuliah

Sistem Komunikasi Optik

Kode Mata Kuliah

TES 4111

Beban SKS

2 (dua)

Semester

7 (Tujuh)

Pengajar

Anhar, ST., MT.

Hari/Jam

Kamis/10:45-12:25

Ruang

305

Jlh Peserta

15 Orng

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Deskripsi Mata Kuliah • Mempelajari struktur fiber optik dan perambatan cahaya optik. • Menghitung penurunan kualitas sinyal/rugi-rugi pd fiber. • Mempelajari karakteristik sumber dan detektor optik. • Mempelajari cara pembangkitan dan kopling daya pd optik. • Merencanakan link fiber. • Mempelajari teknik pengukuran pd optik.

Tujuan • Mahasiswa dpt menjelaskan sifat perambatan optik, menghitung rugi-rugi pd sistem optik, memahami karakteristik sumber dan detektor optik serta mendesain link optik.

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Strategi perkuliahan • Ceramah dng hand out yg telah disusun • Tanya jawab/diskusi dari materi yg disampaikan • Diskusi literatur dng topik dr jurnal • Presentasi dr mhs • Field trip ke perusahaan

Buku/literatur Bacaan 1. Introduction to Fiber Optics, by John Crips, Newnes, 2001. 2. Optical Fiber Communication 2nd Edition, by Gerd Keiser, Mc-GrawHill, 1991. 3. Optical Fiber Communication, by John M Senior, Prentice Hall, 2009. 4. Fiber Optic Communications Systems 3 ed. Wiley, by Agrawal, G.P, 2002. 5. Internet

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Tugas • Literatur/buku bacaan harap dibaca sebelum perkuliahan. • Soal-soal latihan/tugad dikerjakan secara mandiri. • Quis dilaksanakan 4x. • Jurnal-jurnal dibaca dan dipelajari.

Penilaian • Evaluasi : – PR/Tugas – QUIZ – UTS – UAS

: : : :

15-30% 15-30% 25-30% 25-40%

• Kehadiran : – Minimal 80% kehadiran dosen!!

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Penilaian Nilai A AB+ B BC+ C D E

Point 4,00 3,75 3,500 3,00 2,75 2,50 2,00 1,00 0,00

Range 85-100 80-85 75-80 70-75 65-70 55-65 45-55 25-45 0-25

Jadwal Kuliah Tanggal

Topik Bahasan

20 Sept 2012

Kontrak Kuliah, Perkembangan optik

27 Sept 2012

Struktur optik dan perambatannya

4 Okt 2012

Struktur optik dan perambatannya,

11 Okt 2012

Quiz 1, Karakteristik trans optik

18 Okt 2012

Karakteristik trans optik

Jadwal Pengganti

Sumber optik

1 Nov 2012

Responsi dan Quiz 2

8 Nov 2012

UTS

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Jadwal Kuliah Tanggal

Topik Bahasan

15 Nov 2012

Pembangkitan dan kopling daya optik

22 Nov 2012

Pembangkitan dan kopling daya optik, Quiz 3

29 Nov 2012

Detektor dan amplifier optik

6 Des 2012

Desain link optik 1

13 Des 2012

Desain link optik 2

20 Des 2012

Metode pengukuran optik, quiz 4

27 Des 2012

Modulasi dan multiplexing serta jaringan optik

UAS

Saran/harapan anda

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Perkembang fiber? Deploying Fiber at Mach 3

Optical Fiber

• Fiber is deployed at a rate of 2000 miles every hour

Kabel optik dunia...

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Di indonesia

Bandingkan....

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BW of Optical Fiber Transmission

Sejarah Optical Era • Optical Fibers; 1978 • Optical Amplifiers; 1990 • WDM Technology; 1996 • Multiple bands; 2002 • Microwaves and coaxial cables limited to B 100 Mb/s. • Optical systems can operate at bit rate >10 Tb/s. • Improvement in system capacity is related to the high frequency of optical waves (200 THz at 1.5 μm).

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Evolution of Light wave systems 1st Generation: The development of low-loss fibers and semiconductor lasers (GaAs) in the 1970‘s. A Gallium Aresenide (GaAs) laser operates at a wavelength of 0.8μm. The optical communication systems allowed a bit rate of 45Mbit/s and repeater spacing of 10km.

Example of a laser diode. (Ref.: Infineon)

Evolution of Lightwave systems 2nd Generation: The repeater spacing could be increased by operating the lightwave system at 1.3μm. The attenuation of the optical fiber drops from 23dB/km at 0.8μm down to 0.4dB/km at 1.3μm. Silica fibers have a local minima at 1.3μm.

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2nd Generation: The transition from 0.8μm to 1.3μm lead to the 2nd Generation of lightwave systems. The bit rate-distance product can be further increased by using single mode fibers instead of multi-mode fibers. Single mode fibers have a distinctly lower dispersion than multi mode fibers. Lasers are needed which emit light at 1.3 μm.

3rd Generation: Silica fibers have an absolute minima at 1.55μm. The attenuation of a fiber is reduced to 0.2dB/km. Dispersion at a wavelength of 1.55μm complicates the realization of lightwave systems. The dispersion could be overcome by a dispersion-shifted fibers and by the use of lasers, which operate only at single longitudinal modes. A bit rate of 4Gbit/s over a distance of 100km was transmitted in the mid 1980‘s.

Traditional long distance single channel fiber transmission system. Ref.: H. J.R. Dutton, Understanding optical communications

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3rd Generation: The major disadvantage of the 3rd Generation optical communication system is the fact that the signals are regenerated by electrical means. The optical signal is transferred to an electrical signal, the signal is regenerated and amplified before the signal is again transferred to an optical fiber. 4th Generation: The development of the optical amplifier lead to the 4th Generation of optical communication systems.

Schematic sketch of an erbium-doped fiber amplifier (EDFA). Ref.: S.V. Kartalopoulos, Introduction to DWDM Technology

Evolution of Lightwave systems

State of the Art optical communication system: Dense Wavelength Division Multiplex (DWDM) in combination of optical amplifiers. The capacity of optical communication systems doubles every 6 months. Bit rates of 10Tbit/s were realized by 2001. Ref.: S. Kartalopoulos, WDWM Networks, Devices and Technology

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Optical Fiber Communication Trends

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Optical Fiber Communication Sytem

Long-distance and Capacity Capacity (Bandwidth): 800nm to 1700nm at attenuation < 3dB/km

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Long-distance and Capacity

Long-distance and Capacity

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Advantages/Disadvantages of Optical Fiber • Advantages – Noise resistance – Less signal attenuation – Higher bandwidth

• Disadvantages – Cost – Installation/Maintenance – fragility

Advantages of fiber optics 







Much Higher Bandwidth (Gbps) - Thousands of channels can be multiplexed together over one strand of fiber Immunity to Noise - Immune to electromagnetic interference (EMI). Safety - Doesn’t transmit electrical signals, making it safe in environments like a gas pipeline. High Security - Impossible to “tap into.”

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Advantages of fiber optics 







Less Loss - Repeaters can be spaced 75 miles apart (fibers can be made to have only 0.2 dB/km of attenuation) Reliability - More resilient than copper in extreme environmental conditions. Size - Lighter and more compact than copper. Flexibility - Unlike impure, brittle glass, fiber is physically very flexible.

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Areas of Application Telecommunications Computer network LA N,WAN Cable TV CCTV Optical Fiber Sensors  Nuclear plant instrument  Industrial process control system

Optical Fiber - Applications • • • • •

Long-haul trunks Metropolitan trunks Rural exchange trunks Subscriber loops LANs

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