1、 DOCUMENT Single-Mode Fiber Optic System Transmission Design Addendum 1 TIA-559-1 (Addendum No. 1 to TIA-559) Reaffirmed August 15,2002 OCTOBER 1992 1 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the Telecommunications Industry NOTICE TIA Engineering Standards and Publications are designed t
2、o serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for their particular need. The existence o
3、f such Publications shall not in any respect preclude any member or non-member of TIA from manufacturing or selling products not conforming to such Publications. Neither shall the existence of such Documents preclude their voluntary use by non-TIA members, either domestically or internationally. TIA
4、 DOCUMENTS TIA Documents contain information deemed to be of technical value to the industry, and are published at the request of the originating Committee without necessarily following the rigorous public review and resolution of comments which is a procedural part of the development of a American
5、National Standard (ANS). TIA documents shall be reviewed on a five year cycle by the formulating Committee and a decision made on whether to reaffirm, revise, withdraw, or proceed to develop an American National Standard on this subject. Suggestions for revision should be directed to: Standards +-,
6、EIA TIA-559 89 m 3234600 0010258 1 = EIA/TIA-559 Page 3 Manufacturer Terminal Equipment identification System design application, e.g., Single-mode, Multimode Operating wavelength Output power level Source type Optical device temperature controller BRH Classification, e.g., Class I, Class II, etc. M
7、anufacturer product change designation, e.g. issue, revision. Cl&aUmume - 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 transmitter connector is the optical connector provide
8、d 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 (Multimode, Single-mode) Mating Connector Model N
9、umber (Multimode, Single-mode). 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. 8 2.2.2 Transmission Parameters The system integrator should specify the following: al Wavehgh
10、 (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 measurement method, where the effective optical
11、 power resides. The procedure for determining the central wavelength is contained in P - 6. al Wav ( Armin, hrmax) - The minimum and maximum wavelength limits, respectively, of the total allowed range of transmitter central wavelengths caused by the combined worst case variations due to manufacturin
12、g, temperature, aging, and any other significant factors, as determined when operated under standard operating conditions ( hl mifil , A, mnxl) or extended operating conditions (hr ,in2, h, maxz). Power ( Pr) - The worst case minimum value of the optical power (dBm) coupled into the station cable (o
13、n the line side of the transmitter unit connector), specified as PT 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 variations with temperature and aging drifts in a w
14、orst 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 unit providing the receiver function should
15、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 specifications Detector type Optical device temperat
16、ure 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 connector is the optical connector provided a
17、t 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) Mating Connector Model Number (Multimode, S
18、ingle-mode). (reference EIA-492) : General fiber type Class of fiber Mode field diameter (if single-mode). 2.3.2 Transmission Parameters The transmission parameters which should be specified for the receiver unit are the following: ( PR ) - The worst case value of the input optical power (dBm) to th
19、e 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 to achieve the manufacturer specified bit error ratio as measured utilizing the procedure contained in QFSTP -3, The receiver s
20、ensitivity value specified shall include the following performance degradations combined in a worst case fashion: - The identification of the receiver pigtail shall include the following information a) ,b) Manufacturing variations with temperature and aging drifts. Maximum transmitter power penalty
21、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 ). Maximum transmitter power penalty resulting from the use of a transmitter with a worst case rise/fall time when operated u
22、nder standard operating conditions ( PR ) or extended operating conditions ( PR ). c) EIA TIA-559 89 = 3234600 OOLO260 T EIA/TIA-559 Page 5 The receiver sensitivity should not include power penalties associated with dispersion (pulse broadening) or reflection. These are specified separately by the p
23、arameters PD and Rp, respectively. (Po)- 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, and Maxi
24、mum Transceiver Dispersion (DTR) specified by the manufacturer, when operated under standard operating conditions (PD 1) 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 measure of
25、 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 measuring the
26、 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 operatin
27、g 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 the re
28、ceiver 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 requir
29、ement 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 WDM Dev
30、ice 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 conne
31、ctor 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 system
32、 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 TIA-557 87 = 323Yb00 00102bl 1 ELA/TIA-559 Page 6 par
33、ameters, 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, = loss between mating optical connectors of the same
34、type and model, from the same manufacturer. The system integrator should specify the following: N, = Worst case value of connector loss (dB). - Connector variation is the maximum value (dB) of the difference in insertion Number of single-mode to single-mode connectors. This is the number recommended
35、 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 used within
36、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 should provide th
37、e 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 o Nominal cladding diameter and tolerance o Maximum cladding ovality o Maximum corehladding concentricity error. The i
38、nterconnection related parameters are needed to calculate the connection losses of field - installed splices and connectors. Also, suppliers should specify the following transmission parameters: USM = Worst case end of life loss (dB/km) of single-mode regenerator station cable. A, = Cable cutoff wav
39、elength (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 89 m 3234600 OOL02b2 3 m EIA/TIA-559 Page 7 tsM = Total length in km, on both ends of a reg
40、enerator section, of single-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) b) Parameters for specific applications. These are specified at the time of initial install
41、ation. Global loss and chromatic 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
42、 parameters should be specified. Each category will now be explained. 3 .I 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 discuss
43、ed in this section are to 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 0 The c
44、abled fiber reel length tR (in km). o The nominal central wavelength (A, no,n) and central wavelength range (A, min to A, ,) 0 The type of splice, if appropriate. o Splice loss information: environments). a corresponding to the terminal equipment to be used. Us = Maximum allowable splice loss (in dB
45、/splice) at 23C. UST = Effect 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 Designa
46、tion of the cable. o Maximum cable cutoff wavelength A,(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 mul
47、tiple modes are supported. 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 wa
48、velength range described in 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, A, will be found in the shortest e EIA TIA-559 89 W 3234
49、b00 00102b3 5 W EIA/TIA-559 Page 8 installation or repair cable length. A criterion which will insure a system is free from high cutoff wavelength problems is: where h, min 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 transmitter?s nominal central wavelength 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 transmitter?s central wavelengt
