TIA-559-1989 Single-Mode Fiber Optic System Transmission Design《单模光纤系统传输设计》.pdf

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1、EIA TIA-559 89 m 3234600 .O010253 2 m /- +-“-, EIA TIA-559 89 m 3234600 0010258 1 EIA/TIA-559 Page 3 Manufacturer Terminal Equipment identification System design application, cg., Single-mode, Multimode Operating wavelength Output power level Source type Optical device temperature controller BR# Cla

2、ssification, e.g., Class I, Class II, etc. Manufacturer product change designation, e.g. issue, revision. Cl&aUaume - The optical source type is characterized by identifying as a minimum: Type of laser Material composition of source: e.g., InGaAs Generic device structure: e.g., BFB. - The transmitte

3、r connector is the optical connector provided at the output of the transmitter that attaches to the transmitter pigtail. The transmitter connector description, as a minimum includes: Connector Manufacturer Connector Type (e.g., Biconic, FC, etc.) Connector Model Number Connector Classification (Mult

4、imode, Single-mode) Mating Connector Model Number (Multimode, Single-mode). 8 r Pigtail - The identification of the transmitter pigtail shall include the following information (reference EIA-492): General fiber type Class of fiber Mode field diameter. 2.2.2 Transmission Parameters The system integra

5、tor should specify the following: al Wavehgrh (A, no,n) - The nominal value of the transmitter central wavelength for the application under consideration. The supplier should specify the following: fl (A,)- The central wavelength identifies the wavelength, defined by a Peak Mode or Power Weighted me

6、asurement method, where the effective optical power resides. The procedure for determining the central wavelength is contained in P - 6. al Wav ( Almin, hlmax) - The minimum and maximum wavelength limits, respectively, of the total allowed range of transmitter central wavelengths caused by the combi

7、ned worst case variations due to manufacturing, temperature, aging, and any other significant factors, as determined when operated under standard operating conditions ( hl mini, X, mnxl) or extended operating conditions (h, ,in2, h, maxz). Power ( Pr) - The worst case minimum value of the optical po

8、wer (dBm) coupled into the station cable (on the line side of the transmitter unit connector), specified as Pr1 for standard operating conditions or P72 for extended operating conditions, and as measured utilizing the procedure contained in The worst case minimum value combines manufacturing variati

9、ons with temperature and aging drifts in a worst case fashion. EIA/TIA-559 Page 4 ODtm (OR,) - The maximum percent (%) of total reflected optical power that a transmitter can accommodate and maintain its stated performance. 2.3 Receiver Information 2.3 .I General Information ver Information - The un

10、it providing the receiver function should have a unique descriptor from which can be determined the following information by utilizing the appropriate documentation: Manufacturer Terminal Equipment identification System design application, e.g., Single-mode, Multimode Receiver performance specificat

11、ions Detector type Optical device temperature controller Manufacturer product change designation, e.g., issue, revision. - The optical detector type is characterized by identifying as a minimum: Type of device: e.g., PIN , APD Material composition of detector: e.g, Ge, Si. -ver C- - The receiver con

12、nector is the optical connector provided at the input to the receiver that attaches to the receiver pigtail. The receiver connector description, as a minimum includes: Connector Manufacturer Connector Type (Biconic, FC, etc.) Connector Model Number Connector Classification (Multimode, Single-mode) M

13、ating Connector Model Number (Multimode, Single-mode). - The identification of the receiver pigtail shall include the following information (reference EIA-492): General fiber type Class of fiber Mode field diameter (if single-mode). 2 -3.2 Transmission Parameters The transmission parameters which sh

14、ould be specified for the receiver unit are the following: ( PR ) - The worst case value of the input optical power (dBm) to the receiver (on the line side of the receiver module connector), specified as PR for standard operating conditions or PR for extended operating conditions, that is necessary

15、to achieve the manufacturer specified bit error ratio as measured utilizing the procedure contained in QFSTP-3, The receiver sensitivity value specified shall include the following performance degradations combined in a worst case fashion: a) Manufacturing variations with temperature and aging drift

16、s. , b) Maximum transmitter power penalty resulting from the use of a transmitter with a worst case extinction ratio (re) when operated under standard operating conditions ( PR ) or extended operating conditions ( PR ). c) Maximum transmitter power penalty resulting from the use of a transmitter wit

17、h a worst case rise/fall time when operated under standard operating conditions ( PR ) or extended operating conditions ( PR- ). EIA/TIA-559 Page 5 The receiver sensitivity should not include power penalties associated with dispersion (pulse broadening) or reflection. These are specified separately

18、by the parameters PD and Rp, respectively. (PD)- The maximum power penalty (dB) associated with the worst case increase in receiver input optical power level to account for the total pulse distortion due to Intersymbol Interference (ISI) and Mode Partition Noise (MPN) at the specific Bit Rate, BER,

19、and Maximum Transceiver Dispersion (DTR) specified by the manufacturer, when operated under standard operating conditions (Pol) or extended operating conditions (PD2). The procedure for measuring dispersion power penalty is contained in BTP - 1Q Power Pcmky RP - The reflection power penalty is a mea

20、sure of the additional power required by a receiver, when the manufacturer specified value of Maximum Optical Reflection (OR,) is introduced at the line side of the transmitter connector, to achieve the same BER performance that is obtained without the introduced reflection. The procedure for measur

21、ing the reflection power penalty is contained in OFSTP-Il, ver Dgmsin (DTR)- The worst case dispersion (psechm), due to fiber length, that can be accommodated by a transmitter-receiver pair to meet the performance (i.e., Bit Rate and BER) specified by the manufacturer, when operated under standard o

22、perating conditions (&RI) or extended operating conditions (DTR). (Rmax) - The maximum value of the input optical power (dBm) to the receiver (on the line side of the receiver module connector), when operated under standard operating conditions (Rmox.) or extended operating conditions (Rmaxl), that

23、the receiver will accept and maintain the manufacturer specified bit error ratio as measured utilizing the procedure 0 contained in QFSTP-3, The receiver parameters PR, PD, DTR and R should be provided for at least one of the BER values shown in Worksheets 2 and 3. Since a regenerator sections BER r

24、equirement depends on length, the parameters will cover most applications. Also, the parameters corresponding to high BER values may be useful in verifying system margins. 2.4 Attenuators Suppliers should provide a description of the attenuators that are to be used with the system, if needed. 2.5 WD

25、M Device If a WDM device is being offered, suppliers should specify the manufacturer, model number, number of channels, and loss: UWDM = Worst case value of the all-inclusive loss (dB) associated with wavelength-division- multiplexing equipment (at both ends), including all insertion and additional

26、connector losses as well as other degradations. The allocations shall include the effects of temperature, humidity, and aging. The loss corresponds to the transmitter wavelength stated in Worksheets 2 and 3. 2.6 Safety Margin M = Safety margin, in dB, for unexpected losses, to be determined by the s

27、ystem integrator for a specific application. Note that M must not include penalties for expected losses and degradations (e.g., laser aging, cable aging, reflections, repairs). These effects are already included in the appropriate transmission - -. EIA TPA-557 87 323Yb00 00102bl L ELA/TIA-559 Page 6

28、 parameters, according to the definitions of this document. 2.7 Connectors Suppliers should specify the following connector information: Single-mode connector type (e.g., Biconic, FC, etc.) . Manufacturer Model number Also, suppliers should specify: U, = Worst case value of connector loss (dB). r Va

29、- - Connector variation is the maximum value (dB) of the difference in insertion loss between mating optical connectors of the same type and model, from the same manufacturer. The system integrator should specify the following: N, = Number of single-mode to single-mode connectors. This is the number

30、 recommended by a system integrator for a typical point to point regenerator section. This should not include the transmitter unit or receiver unit connectors, since they are already accounted for in PT and PR, respectively. 2.8 Station Cable Station cable represents the optical fiber cable that is

31、used within a building environment to connect the outside plant optical fiber cable to the optical fiber system terminal equipment. The station cable may provide this optical path via some form of optical patch panel that allows optical path rearrangement to the outside plant fibers. Suppliers shoul

32、d provide the following information: Manufacturer General fiber type (ref. EIA-492) Class of fiber (ref. EIA-492) Interconnection related parameters: o Nominal mode field diameter and tolerance 0 Nominal cladding diameter and tolerance 0 Maximum cladding ovality o Maximum core/cladding concentricity

33、 error. The interconnection related parameters are needed to calculate the connection losses of field - installed splices and connectors. Also, suppliers should specify the following transmission parameters: Us, = Worst case end of life loss (dB/km) of single-mode regenerator station cable. X, = Cab

34、le cutoff wavelength (ref. FOTP-170). The cut off wavelength of the fiber jumper cable shall be below the mnimum value of the transmitter central wavelength. The system integrator should specify the following: EIA/TIA-559 Page 7 tsM = Total length in km, on both ends of a regenerator section, of sin

35、gle-mode regenerator station cable. 3. Cable Transmission Design Information For a given cable type, cable suppliers should provide two categories of cable transmission information: a) Parameters for specific applications. These are specified at the time of initial installation. b) Global loss and c

36、hromatic dispersion characteristics. Since these are not guaranteed values, the user should use them for initial feasibility studies only, and should measure the parameters for a specific upgrade. If a known upgrade is planned at the time of initial installation, the required parameters should be sp

37、ecified. Each category will now be explained. 3.1 Parameters for a Specific Application This section discusses the cable transmission parameters which are to be specified by the system integrator and by the supplier. They are summarized in Worksheet 4. The parameters discussed in this section are to

38、 be given as worst case values. Statistical parameters are treated in Appendix 1. The system integrator should specify the following: o Type of application (aerial, buried, underground). o Temperature range (e.g., -7C to 40C for underground and -40C to 77C for aerial a environments). 0 The cabled fi

39、ber reel length tR (in km). o The nominal central wavelength (X, no,n) and central wavelength range (Xrmin to X, ,J corresponding to the terminal equipment to be used. 0 The type of splice, if appropriate. o Splice loss information: Us = Maximum allowable splice loss (in dB/splice) at 23C. US = Effe

40、ct of temperature on splice loss (in dB/splice) at the worst case temperature conditions, over the specified cable operating temperature range. Note that if U, already includes corrections for UST, then UST will be zero. The supplier should specify the following: o Designation of the cable. o Maximu

41、m cable cutoff wavelength X,(nrn) as per FOTP - 170, with cable deployment conditions as shown in Figure 1. The cutoff wavelength of a cabled optical fiber demarcates the wavelength region above which the fiber supports propagation of only a single mode and below which multiple modes are supported.

42、Operation below the cutoff wavelength may result in modal noise, modal distortion (increased pulse broadening), and improper operation of connectors, splices, and WDM couplers. For these reasons, the system operating wavelength range, dictated by the transmitter central wavelength range described in

43、 Section 2.2.2, must be greater than the maximum allowed cutoff wavelength to insure the system is operating entirely in the fibers single-mode regime. In general, the highest value of cabled fiber cutoff wavelength, h, will be found in the shortest e EIA TIA-559 89 W 3234b00 00102b3 5 W EIA/TIA-559

44、 Page 8 installation or repair cable length. A criterion which will insure a system is free from high cutoff wavelength problems is: where htmin is defined in Section 2.2.2. o Cable loss parameters: U, = Worst case end of life cable loss (in dB/km at 23C) at the transmitters nominal central waveleng

45、th At nom. This includes splicing loss caused by the fiber or cable manufacturing process. Uh = The largest increase in cable loss (in dB/km at 23OC) above U, which occurs over the transmitters central wavelength range (Armia to h,). The determination of this is illustrated in Figure 2. Uc = Effect

46、of temperature on end of life cable loss (in dB/km) at the worst case temperature conditions over the specified cable operating temperature range. e Dispersion parameters: ho Ao mIIx = zero-dispersion wavelength range of variation. S O mm = maximum value of the zero-dispersion slope (the dispersion

47、slope (in psecl(nrn2.km) at the zero-dispersion wavelength). o Interconnection related parameters. Suppliers should specify the nominal mode field diameter and tolerance, the nominal cladding diameter and tolerance, the maximum cladding ovality, and the maximum corehladding concentricity error. Thes

48、e parameters are needed to calculate the connection losses of field-installed splices and connectors. If a future system upgrade is planned, the user should specify the performance required for the upgrade and the supplier should furnish the information of Worksheet 4 for the original application an

49、d the future upgrade. 3.2 Global Fiber Parameters A future application of an installed cable may arise which was not anticipated when the cable was purchased (e.g., an unforeseen upgrading of terminal equipment, rerouting of traffic, or restoration). In such cases, global fiber characteristics may be helpful for indicating to the user the feasibility of the cables proposed application. The fiber global loss and dispersion characteristics are curves which depict these parameters as a function of wavelength. They are to be provided over the