Embed Size (px)
Citation preview
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
Polymer Optical Fibres for In-house Cabling
Jürgen Krauser, Olaf Ziemann
Deutsche Telekom AG Technologiezentrum DarmstadtGoslarer Ufer 35D 10589 Berlin, GermanyTel. : +49 30 3497 - 4422, -4442Fax.: +49 30 3497 - 4968, -4443e-mail: [email protected]
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
1. Introduction2. Some basic properties3. State of POF availability4. Transmitters for POF5. Standard for POF6. Realised POF transmission systems7. Example for In-house network based on POF8. Conclusion
Polymer Optical Fibres for In-house Cabling
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
Advantages of Polymer Optical Fibres
• High flexibility• Easy handling and processing• EMI immunity• Low cost components• High bandwidth• Low attenuation• ATM requirements
Alternative to copper based cable system
1. Introduction
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
2. Some basic properties
Core/cladding diameterµm
(graded index profile)420/500
(step index profile)980/1000
Numerical aperture 0.17...0.30 0,470,25..0.30 (low NA)
Refractive indexdifference
0.01...0.03 0.07
Attenuation dB/km(present values)
56 - 113 at 650 nm <50 at 1.300 nm
min. 125 at 650 nmtyp. 150 at 650 nm
Bandwidth MHz (100 m) 1000 - 2000 50170 (low NA)
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
Attenuation of optical fibres
0,1
1
10
100
1000
10000
100000
300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700
1 mm SI-POF (PMMA)
1 mm SI-POF
GI-POF
Singlemode fibre
Wavelength /nm
(Silicon Oxid)
Multimode fibre
(Silicon oxid)plastic cladding
1 mm Low NA POF (PMMA)
PMMA deuterated
fluorinated (CYTOP)
GI-POFfluorinated (CYTOP)(intended values)
Loss / dB/km
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
Fibre LUMINOUS LUMINOUS ESKAMEGA ESKA-PREMIER
RAYTELA RAYTELA
Type AC-1000W TC-1000W MH 4002 GH 4002 PMU-CD-1002-22-E
PFU-CD-1002-22-E
Low-NA Std.-NA Low-NA Std.-NA Low-NA Std.-NAManu-facturer
Asahi Asahi Mitsubishi Mitsubishi Toray Toray
Diametertyp.
[µm] 980 980 980 980 980 980
Numericalaperture typ.
0,32 0,485 0,33 0,51 0,32 0,46
Attenuationtyp.
[dB/km] 135 125 max. 170 140 170 150
Bandwidth100m
[MHz] 100 40 40 100
Bit rate min50m
[Mbps] 156 100 156
Bend radiusmin.
[mm] 25 25 25 25 17
3. State of POF availability
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
50
100
1000
10000
350 400 450 500 550 600 650 700 750 800 850 900
Wavelength /nm
Attenuation /dB/km
Toray St.-NA 1995 PCU-CD1002 Toray Low-NA 1997 PMU-CD1002Mitsubishi St.-NA 1995 ESKAEXTRA Mitsubishi Low-NA 1997 ESKAMEGAAsahi Low-NA 1996 NC-1000, Asahi Asahi St.-NA 1996 TC-1000
500
200
5000
2000
Attenuation Spectra of various POF
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
LED SLED LD VCSEL
Available at 650 nm yes yes yes near future
Available at 520and 580 nm
yes no laboratorystate
no
Efficiency 1..10 % 5..20 % 10..50 % 10..30 %
Material Systems AlGaAs (660 nm)AlInGaP (650 nm)InGaN (520 nm)
AlInGaP(650 nm)
AlInGaP(650 nm)
AlInGaP(650 nm)
Emitting area 300x300 µm2 20x2 µm2 3x0,5 µm2 10x10 µm2
Farfield angle v/h ±45° ±30°/±10° ±50°/±10° ±10°
Threshold current - - 20..50 mA 1..2 mA
Temperaturedependence (Popt)
medium (red)very low (green)
medium(red)
high low/medium
4. Transmitters for POF
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
Spectra of red and green LEDs in relation to attenuation minima of POF
0
100
200
300
400
500
400 450 500 550 600 650 700 750Wavelength /nm
POF-attenuation /dB/km
0,0
0,2
0,4
0,6
0,8
1,0
1,2
1,4rel. power
1 mm SI-POF
NSPE 510SHFBR 1528
Point of reference
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
Attenuation minima at 520 nm, 580 nm and 650 nmGaAlAs: wavelength 660 nm,efficiency up to 15 %AlInGaP: wavelength 650 nm, efficiency up to 10 %AlInGaP: wavelength 590 nm, efficiency up to 5 %GaAsP: wavelength 580 nm, efficiency up to 0,5 % AlInGaP: wavelength 570 nm, efficiency up to 1 %GaP: wavelength 555 nm, efficiency up to 0,1 %InGaN: wavelength 520 nm, efficiency up to 5 %InGaN: wavelength 500 nm, efficiency up to 8 %
Materials for POF Systems
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
Basic materials for optical transmitters
0,01
0,10
1,00
10,00
400 450 500 550 600 650 700
Wavelength /nm
optical power /mW
GaInN
GaInNGaInN
SiC
AlInGaPAlInGaP
AlInGaP
GaAsP
GaAsP
GaAsP
GaP:N
GaP:N
GaAlAs(DH)
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
SpecificationCore/Cladding diameter min./typ./max. [µm] 931/980/1029
950/1000/1050Jacket diameter min./typ./max. [mm] 2.0/2.2/2.4Numerical Aperture 0,30 to 0,35Bandwidth min. [MHz·km]under full launch condition
10
Attenuation at 25°C, 50% RH, max. [dB/50 m]650 nm collimated light
7.8 (156 dB/km)
Attenuation increase at 70°C, 95% RH [dB/50 m] 0,8 (16 dB/km)Loss increment due to source spectral distribution [dB/50 m](660 nm center wavelength, 40 nm FWHM gaussian)
3,4 (68 dB/km)
Loss margin for launch NA up to 0,3 [dB] 0,5Loss for static bending [dB]15 quarter turns with 25 mm bending radius
0,5
Worst case fiber loss [dB for 50 m] 13,0 (260 dB/km)
5. Standard for POF ATMForum Specification
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
6. Applications for
POF transmission
systems
1 M
10 M
100 G
100 M
10 G
1 G
1 T
10 Base T 10 Mb/s
Data rate (b/s)
1 10 100 1000Distance (m)
Interconnection
ATM 156 Mb/s
ATM 622 Mb/s
Multichannel CATVca. 100 ch.
Fiber To The Home
GI POF
Twisted Pair, Co-ax Cablesand Low NA SI POF
Source:Koike, POF´96, Paris: "Status of POF in Japan", pp. 1-4
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
20
100
1.000
5.000
50
200
500
2.000
647 nm LD, GI-POF
HP
652 nm LD
HiSPOT
10 100 20020
Bit rate /MBit/s
Fiber length /m
670 nm VSEL, GI-POF
500 nmGaN-LED
NEC, 650 nm LED
1,3 µm LD,PF-GI-POF
650 nm LDIEEE 1394
4 x 1,3 µm WDM
50 400
645/675 nm LD, GI-POF2,5 Gbit/s + 620 Mbit/s
HP
650 nm LD652 nm LD
650 nm LD
670 nm
670 nm
585 nm,Wolter GmbH
Realised POF transmission systems
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
7. Example for an In-house Network based
on POFHome-Working
Home-Shopping
Radio on Demand
Video on Demand
interactive GamesDigital Radio
POTS
0 1 2 3 4 5 m
0 3 6 9 12 15 ft
Cable lenght(Flat 80 m², 3 rooms)cable near ceiling
PC/Modem: 8 mRadio/TV: 10 mPhone: 8 mPC/Radio: 10 m
_____________total: 36 m
=====!"§ Deutsche
Telekom
ANCITJ. Krauser31.03.1998
8. Conclusion
• Commercial available:Standard- and Low-NA POF , POF-Systems at 650 nm for bitrates up to 155 Mbps over 50 m or 100 Mbps over 70 m.
• Standard: ATM Forum specifications• New developments:
• Use of green and yellow LED for PMMA-Fibre• Increasing bandwidth by using GI-POF (up to 2,5 Gbit/s)• Increasing distance by using fluorinated POF (up to 2 km)• High speed transmitter by VCSEL
