TW475071B - Low dispersion slope waveguide fiber - Google Patents
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2 A7 五、發明説明(ί ) 發明背t : 本發明係關於單模光學波導纖維,特別是關於波導纖 維,其總色散在選擇波長範圍内保持相當低值。 由於高數據速率以及長距離再發器需求,已加強尋求 設計長距離高速率軌紐能之光學波導。其他f求為波 導纖維與光學放大n相匹配,其通f顯示出15施峻漏 nm波長範圍内之最佳增益曲線。考慮可使用波長延伸至 lj70nm至1700rm之L頻帶範圍内,優先地在157〇咖至162511111 範圍内。另外一個光學波導纖維操作波長範圍為由125〇nm 延伸至1350nm頻帶。雖然在較低頻帶之衰減與較高操作波 長頻窗比較為較大,該較低波長頻帶能夠提供其他資訊頻 道,其將顯著地提局整體系統容量。 在一些情況下,波導資訊容量藉由波長多工化(WDM)技 術提而,額外的波導纖維特性變為相當的重要。對於WDM, 高速率系統波導在操作波長範圍内應具有非常低但是非零 之總色散,因而限制四波相混之非色散效應。 經濟部中央標準局員工消費合作社印製 (請先閲讀背面之注意事項再填寫本頁) 另外一項在非常高功率密度即單位面積高功率之系統 中產生無法接收之非線性效應為自相調變。自相調變能夠 藉由設計具有大有效面積波導心蕊加以控制,因而減小功 率密度。另外一項方法為控制波導總色散符號使得波導總 色散作為抵消自相調變之色散效應。 一具有正值色散之波導,其中正值係指短波長訊號以較 局速率運行而高於較長波長,其產生色散效應與自相調變 情況相反,因而消除自相調變色散。 —— ______B7 五、發明説明(> ) 該波導纖維揭示於以及說明於美國第08/559954號專 利中,該專利在此加入作為參考之用。除此該揭示之波導 在操作波長頻窗内總色散為正值以及具有較低下限大於 2· Ops/nm-km以更進一步減小四波相混所致之功率損失。 因而存在一項光學波導之需求,其: -至少在1530nm至1570nm波長範圍内為單模的,以及優先 地在延伸至較低波長1250nm之範圍内; -在1530nm至1570nm範圍外具有零色散波長; -在1530nm至1625nm範圍外具有正值總色散,其並不小於 2. Ops/nm-km; -在1570nm至1625nm範圍内具有較低衰減,小於〇. 25dB/km; -保持有用的高性能波導特性例如為高強度以及對避免彎 曲產生之損耗為可接受的。 藉由將心蕊區段結構加入波導纖維心蕊之觀念已在本 公司Bhagavatula美國第4715679號專利說明,該心蕊區段 具有明顯的分佈對波導纖維提供設計之彈性。能夠使用區 段化心蕊觀念以達成特別波導纖維特性之組合,例如底下 所說明之情況。 定義: 經濟部中央標準局員工消費合作社印裝 下列定義依據一般業界所使用之定義。 -折射率分佈為波導纖維半徑與折射率間之關係。本發明 心蕊折射率分佈依據上側以及下側分佈邊界加以說明。除 此特定實施例在一些半徑點處以相對指數△ (r)%值(如底 下所定義)加以說明。在每一情況中所選擇點完全地說明 L____ ^ 本紙浪尺度適用中國國家標準(CNS ) A4規格(210X 297公潑) 475071 五'發明説明(ξ) 折射率分佈。 -折射率分佈半徑,其揭示於附圖中。 義為Α^2?Γ (丨 E rdr)V(丨 E4rdr),其中積 至〇〇,以及E為傳播光線之電場。有效直飾『 可疋義為AefF;r(Deff/2)2。 -WDM表示波長區分多工化。 了SPM表示自相調變,非線性光學現象,其中相對於低於該巧 率名度之磁,具有*於特定辨值之神密度訊號將在 波導中以不同的速率運行。與具有負值符號線性色散情分 比較,SPM促使訊號產生色散。 -FTO表示四波相混現象,其中在波導中兩個或多個訊號干 涉產生不同的頻率訊號。 表示折射率相對之量測,其以下列公式表示, △HOOxOii-nc)/nc界定出,其中m為折射率區段丨之最大 折射率,η。為參考折射率為包層最小折射率,除非另有說明 -α分佈係指折射率分佈,其△(〇%表示,其中b為半徑,其^ 下列公式表示 經濟部中央標準局員工消費合作社印策 △〇)>Δα〇)(ι-[ | b-b。| /(b!-b〇)r),其中b。為分佈最 大點以及b^A(b)%為零之點以及b在bi^b^bf範圍内,其 中如上述所定義,bi為α分佈之初始點,匕為α分佈最終 點,以及α為實數之指數。 在分佈計算模擬中,為了使具有相鄰分佈區段分佈之· 分佈光滑地連接,公式再寫為 A(b)%=A(ba)+[/\(b〇)-A(ba)]{l-[ I b-b〇 | /(bi-b〇)]a} 6 本紙張尺度適用中國國家標準(CNS )八4規格(210&W公釐) 5 寸/丄 A7 、發明説明(屮) 經濟部中央標準局員工消費合作杜印製 其中ba為相鄰區段之第一點。 阻:辦,曲測試使用來比較波導纖維由於彎行該測試,對實質上不產生f曲損耗之波導 耗。波導纖維再編織於針鎖陣列以及再量 =二曲產生之損耗為量測兩個衰減值間之差值。針 ^ ^ ί 絲舰縣坦表面上保 _ ί Γ置。針射心至中心距離為5麵。針鎖直 lm m過程中,施加充份張力使蛇狀編織波 ¥、義維順應針面部份,在該處光纖與·相互接觸。 個彎❹m包含將光纖捲繞於—個或多個預先決 定半仏之’⑼。在賴試巾,所制巨彎_試為波導纖 維捲繞20刪直徑心軸一圈所產生之損耗。 -另外-個弯曲測試為侧向負載測試。在該微彎曲測試中 預先决定長度之波導纖維放置於兩個平板之間。(謂筛網 由直徑0.178mm金屬線製造出。篩開口為邊長為〇185刪方 形二)。已知長度之波導纖維夾於板之間以及當以3〇牛頓 力量將板緊麼在-起時進行量測參考衰減值。7〇牛頓力量 施加於板上時量測增加之衰減值dB/m。所增加衰減值為波 導之側向負載衰減。 發明大要: 本發明揭示出低衰減大有效面積之波導纖維以及符合 先前所說明之需求,以及促使其再重現性地製造。光纖通 常在1530nm至1625nm波長範圍内製造成傳播單模。亦揭示 出使用於131 Onm波長頻窗之折射率分佈設計。不過本發明 請 先 閲 讀 背 意 事 項 再 填 寫 本 頁 4 訂 本紙張尺度適用中國國家標準(CNS U4規格(2iOX29?公澄 475071 A7 6 五、發明説明(f ) (請先閲讀背面之注意事項再填寫本頁} 包合心蕊以及包層折射率分佈之構造,其在所有或部份操 作波長範圍内傳播超過一個模。在傳播超過一個模之情況 ,除了最低階模外所有模強烈地在光纖中衰減。因而較高 階模在光纖距離小於1公里内消失。因而在一般傳送距離 情況光纖只能有效地傳播單模。 本發明第一項係關於具有心蕊區域以及外圍包層之光 學波導纖維。包層與心蕊區域外側表面接觸。心蕊區域與 包層以其各別折射率分佈顯現出特徵。即對每一 t -5·«· 及包層之彻爾⑽峨神△㈣。在 情況中,半徑點在心蕊中心線半徑為零至r〇,由中心線至心 蕊與包層界面處。在中心線處,零半徑點△⑺%=八0%在0· 25%至li範圍内。心焱至包層界面半徑^在匕g微米至18微 米範圍内。在界面半徑處△(!>)%值為零。在中心線與界面 間之半徑點·處,相對折射率由上側以及下側折射率分佈曲 線限制。選擇邊界分佈使得波財效_大於或等於8〇平 方微米以及具有衰減值小於〇· 2〇dB/km,其中該兩個數值係 在波長為1550nm下量測。 在本發明第一實施例中,各別上侧以及下側邊界分佈 顯示為圖3之曲線AB以及CD。 經濟部中央糯準局—工消費合作社印製 在本發明第二項實施例中,各別上側及下側邊界分佈 顯示為圖4曲線EF以及GH。 依據本發明所第一項實施例製造出波導纖維特性揭示 於下列表1及2中。 在本發明第二項中,心蕊區域折射率分佈在充份點處 本紙痕尺度適用中國國家標準(CNS ) 公釐) 經濟部中央標準局負工消費合作社印製 475071 A7 B7 五 '發明説明((> ) 以特定△(!〇%值加以說明以完全地描述心蕊區域之分佈。 特別地,在中心線△(!〇%在0.8%至0.9%範圍内。在半徑〇至 1± 〇· 2微米範圍心蕊區域分佈形狀為之α分佈。“分 佈終點具有相對折射率百分比在0.35%至0.41%範圍内。其 餘心蕊區域折射率分佈為直線連接α分佈以及心蕊終點至 在水平軸上包層界面點r〇。由中心線至心蕊與包層心蕊界 面之距離在9微米至10微米範圍内。在I550nm情況下本發 明波導纖維色散斜率在〇. 〇65ps/nm2-km至0. 067ps/nm2-km 範圍内,在1550nm情況下有效面積在1〇〇平方微米至1〇5平 方微米,以及在1550nm情況下衰減在〇. 182dB/km至0.186 dB/km範圍内。 本發明第三方面為波導纖維,其在中心線上相對折射 率在0.6%至0.7%範圍内。由心蕊區域中心線至心蕊與包層 界面之距離在11. 5微米至12· 5微米範圍内。分佈形狀藉由 在相對折射率百分比△(!〇%與r曲線上特定點界定出。特 別地,△(〇%在半徑r$5+/-0· 2微米範圍内藉由各別值界 定出,在r=l+/-0. 1微米處△(〇%在〇· 48%至〇· 5%範圍内,在 r=2+/-0.1 微米處△(]:)%在〇· 35%至〇. 37%範圍内,在r=3+/-0· 1微米處△(!〇%在〇· 24%至0· 26%範圍内,在r=4+/-0.1微 米處△(!〇%在0· 14%至0· 16%範圍内,在r=5+/-0· 1微米處 △(r)%在0· 05%至0· 08%範圍内。相對折射率分佈藉由直線 連接相鄰點形成。對於其餘分佈,在r=5+/—〇· 1$Γ$Γο半 徑範圍内△(〇%為圓形化階躍折射率分佈,及在r=5+/—〇. 1 微米處△(!〇%在〇· 05%至〇· 08%範圍内。如先前所說明,除 本紙張尺度適用中國國家標準(0奶_)八4規格(21^297公釐) (請先閲讀背面之注意事項再填寫本頁)2 A7 V. Description of the invention (ί) The invention relates to single-mode optical waveguide fibers, and particularly to waveguide fibers, the total dispersion of which remains relatively low in the selected wavelength range. Due to the high data rate and the need for long-distance repeaters, efforts have been made to design optical waveguides for long-distance high-speed rails. The other f is determined as the waveguide fiber matches the optical amplification n, and its pass f shows the best gain curve in the wavelength range of 15 nm. It is considered that the L-band range extending from lj70nm to 1700rm can be used, preferably in the range of 157 ° to 162511111. The other optical waveguide fiber has an operating wavelength range extending from 125nm to 1350nm. Although the attenuation in the lower frequency band is larger compared to the higher operating frequency window, the lower wavelength band can provide other information channels, which will significantly increase the overall system capacity. In some cases, the waveguide information capacity is increased by wavelength multiplexing (WDM) technology, and additional waveguide fiber characteristics become quite important. For WDM, high-speed system waveguides should have very low but non-zero total dispersion in the operating wavelength range, thus limiting the non-dispersion effect of four-wave mixing. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). Another non-linear effect that produces unacceptable non-acceptable effects in a system with very high power density, that is, high power per unit area, is self-tuning change. Self-phase modulation can be controlled by designing a waveguide core with a large effective area, thereby reducing power density. Another method is to control the total dispersion sign of the waveguide so that the total dispersion of the waveguide is used as a dispersion effect to cancel the self-phase modulation. A waveguide with positive dispersion, where a positive value refers to a short-wavelength signal running at a higher local rate than a longer wavelength, which produces a dispersion effect that is the opposite of self-phase modulation, thus eliminating self-phase modulation dispersion. —— ______B7 V. Description of the invention (>) The waveguide fiber is disclosed in and described in US Patent No. 08/559954, which is incorporated herein by reference. In addition, the disclosed waveguide has a positive total dispersion in the operating wavelength window and a lower lower limit greater than 2 · Ops / nm-km to further reduce the power loss caused by four-wave mixing. There is therefore a need for an optical waveguide that:-is single-mode at least in the wavelength range of 1530nm to 1570nm and preferentially extends to the lower wavelength range of 1250nm;-has a zero dispersion wavelength outside the 1530nm to 1570nm range ;-Positive total dispersion outside 1530nm to 1625nm, which is not less than 2. Ops / nm-km;-Lower attenuation in the range of 1570nm to 1625nm, less than 0.25dB / km;-Maintain useful high Performance waveguide characteristics are, for example, high strength and acceptable to avoid losses due to bending. The concept of adding the core core structure to the core of the waveguide fiber has been described in our company Bhagavatula US Patent No. 4,715,679. The core core section has a clear distribution to provide design flexibility for the waveguide fiber. The concept of segmented cores can be used to achieve a specific combination of waveguide fiber characteristics, such as the situation described below. Definitions: Printed by the Consumer Standards Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs The following definitions are based on the definitions used in the general industry. -The refractive index profile is the relationship between the waveguide fiber radius and the refractive index. The core refractive index distribution of the present invention will be described based on the upper and lower distribution boundaries. Except this particular embodiment, the relative index Δ (r)% value (as defined below) is explained at some radius points. The selected points in each case fully explain L____ ^ This paper wave scale is applicable to the Chinese National Standard (CNS) A4 specification (210X 297 public splash) 475071 Five 'invention description (ξ) refractive index distribution. -Refractive index distribution radius, which is disclosed in the drawings. The meaning is A ^ 2? Γ (丨 Erdr) V (丨 E4rdr), where the product reaches 0, and E is the electric field that propagates light. Effective straight decoration "can be defined as AefF; r (Deff / 2) 2. -WDM stands for wavelength division multiplexing. SPM stands for self-phase modulation, a non-linear optical phenomenon, in which a God density signal with a certain discrimination value will operate at different speeds in a waveguide relative to a magnetism below that probability. Compared with a linear dispersion score with a negative sign, SPM promotes signal dispersion. -FTO stands for four-wave mixing, where two or more signals in a waveguide interfere with each other to generate different frequency signals. Represents the measurement of the relative refractive index, which is expressed by the following formula, ΔHOOxOii-nc) / nc is defined, where m is the maximum refractive index of the refractive index section, η. For reference, the refractive index is the minimum refractive index of the cladding. Unless otherwise stated, the α distribution refers to the refractive index distribution, where △ (0%, where b is the radius, and ^ Policy △ 〇) > Δα〇) (ι- [| bb. | / (B! -B〇) r), where b. Is the maximum point of the distribution and the point where b ^ A (b)% is zero and b is in the range of bi ^ b ^ bf, where, as defined above, bi is the initial point of the α distribution, d is the final point of the α distribution, and α Is an exponent of real numbers. In the distribution calculation simulation, in order to make the distributions of adjacent distribution sections smoothly connected, the formula is rewritten as A (b)% = A (ba) + [/ \ (b〇) -A (ba)] {l- [I bb〇 | / (bi-b〇)] a} 6 This paper size applies to China National Standard (CNS) 8 4 specifications (210 & W mm) 5 inches / 丄 A7, invention description (屮) The consumer cooperation of the Central Bureau of Standards of the Ministry of Economic Affairs printed ba as the first point of the adjacent sector. Resistance: Do, bend test is used to compare the waveguide fiber due to bending the test, the waveguide loss does not substantially generate f-curve loss. The waveguide fiber is then woven in the pin lock array and the loss caused by the re-quantity = Erqu is the difference between the two attenuation values. Needle ^ ^ ί silk ship county surface on the surface to protect _ ί Γ. The distance from the needle to the center is 5 faces. In the process of pin lock straight lm m, sufficient tension is applied to make the snake-like braided wave ¥, Yiwei conform to the needle surface, where the optical fiber is in contact with each other. Each bend 包含 m includes winding an optical fiber around one or more of the predetermined half ⑼'s. In Lai test towel, the big bend _ test is the loss caused by the waveguide fiber winding a 20-mm diameter mandrel. -In addition, one bending test is a side load test. In this microbend test, a waveguide fiber having a predetermined length is placed between two flat plates. (It is said that the sieve is made of a metal wire with a diameter of 0.178mm. The opening of the sieve is a side square with a length of 0185). Waveguide fibers of known length were sandwiched between the plates and the reference attenuation was measured when the plates were tightened with a force of 30 Newtons. 70 Newton force Measurement of the increase in attenuation dB / m when applied to the board. The increased attenuation is the side load attenuation of the waveguide. Summary of the invention: The present invention discloses a waveguide fiber with a low attenuation and a large effective area, which meets the needs previously described, and facilitates its reproducible manufacture. Optical fibers are usually manufactured as a propagating single-mode in the wavelength range of 1530nm to 1625nm. It also reveals the design of the refractive index profile used in the 131 Onm wavelength window. However, for the present invention, please read the remarks before filling out this page. 4. The paper size of the book is applicable to the Chinese national standard (CNS U4 specification (2iOX29? Gongcheng 475071 A7). 6. Description of the invention (f) (Please read the notes on the back before Fill out this page} The structure that encompasses the core and the cladding refractive index profile propagates more than one mode in all or part of the operating wavelength range. In the case of propagation of more than one mode, all modes except the lowest order mode are strongly in The attenuation in the optical fiber. Therefore, the higher-order mode disappears within the distance of the optical fiber less than 1 km. Therefore, the optical fiber can only effectively propagate the single mode in the general transmission distance. The first aspect of the present invention relates to an optical waveguide having a core region and a peripheral cladding Fiber. The cladding is in contact with the outer surface of the stamen region. The stamen region and the cladding are characterized by their respective refractive index distributions. That is, for each t -5 · «and the chel saga of the cladding △ ㈣ In the case, the radius point at the center line of the core is from zero to r0, from the center line to the interface between the core and the cladding. At the center line, the point of zero radius △ ⑺% = 80% is at 0.25% To l Within the range of i. The palpitation to cladding interface radius ^ is in the range of dg to 18 microns. At the interface radius, the value of △ (! >)% is zero. At the point of the radius between the centerline and the interface, the relative The refractive index is limited by the upper and lower refractive index distribution curves. The boundary distribution is selected so that the wave financial effect is greater than or equal to 80 square microns and has an attenuation value less than 0.2 dB / km, where the two values are at the wavelength of Measured at 1550nm. In the first embodiment of the present invention, the respective upper and lower boundary distributions are shown as curves AB and CD in Fig. 3. The Central Waxun Bureau of the Ministry of Economic Affairs-Industrial and Consumer Cooperatives printed on the second of the present invention. In the embodiment, the respective upper and lower boundary distributions are shown as curves EF and GH in Fig. 4. The characteristics of the waveguide fiber manufactured according to the first embodiment of the present invention are disclosed in the following tables 1 and 2. In the second of the present invention, In the item, the refractive index distribution of the core region is sufficient at the point of the paper mark. The Chinese National Standard (CNS) mm is applied. 475071 A7 B7 Five 'Invention Note printed by the Central Laboratories of the Ministry of Economic Affairs and Consumer Cooperatives ((>) Add at specific △ (! 〇% value To illustrate, to completely describe the distribution of the pericardial region. In particular, the centerline Δ (! 0% is in the range of 0.8% to 0.9%. The pericardial region distribution shape is in the range of 0 to 1 ± 0.2 μm in radius α distribution. "The end point of the distribution has a relative refractive index percentage in the range of 0.35% to 0.41%. The refractive index distribution in the remaining cardiac region is a straight line connecting the α distribution and the end point of the cardiac core to the cladding interface point r on the horizontal axis. The distance from the line to the interface between the core and the cladding core is in the range of 9 microns to 10 microns. In the case of I550nm, the dispersion slope of the waveguide fiber of the present invention is in the range of 0.065ps / nm2-km to 0.067ps / nm2-km. In the case of 1550nm, the effective area is 100 square micrometers to 105 square micrometers, and in the case of 1550nm, the attenuation is in the range of 182dB / km to 0.186 dB / km. A third aspect of the present invention is a waveguide fiber having a relative refractive index in the range of 0.6% to 0.7% on the center line. The distance from the centerline of the core region to the interface between the core and the cladding is in the range of 11.5 microns to 12.5 microns. The distribution shape is defined by the relative refractive index percentage Δ (! 〇% and a specific point on the r curve. In particular, Δ (〇% is defined by the respective values in the range of the radius r $ 5 +/- 0 · 2 microns) △ (r% = + /-0.1 micron) (〇% is in the range of 0.48% to 0.5%, at r = 2 +/- 0.1 microns, △ (]:)% is 0.35% Within 0.37%, r = 3 +/- 0 · 1 micron △ (! 〇% In the range of 0.24% to 0.26%, r = 4 +/- 0.1 micron △ ( 〇% is in the range of 0.14% to 0.16%, and Δ (r)% is in the range of 0.05% to 0.08% at r = 5 +/- 0 · 1 micron. Relative refractive index distribution It is formed by connecting adjacent points with straight lines. For the rest of the distribution, within the radius r = 5 +/— 〇 · 1 $ Γ $ Γο △ (〇% is the rounded step refractive index distribution, and at r = 5 + / —〇. 1 micron at △ (! 〇% is in the range of 0.05% to 0.08%. As explained previously, except for this paper size, the Chinese national standard (0 milk_) 8 4 specifications (21 ^ 297 Mm) (Please read the notes on the back before filling out this page)
475071 A7 _____ B7_ 五、發明説明(7 ) 非另有說明在r。點處相對折射率百分比為零。本發明波導 纖維在1550nm情況下總色散斜率在〇· 〇66pS//nm2—|^[!至〇. 〇6 8ps/nm2-km,在1550nm情況下有效面積在go平方微米至85 平方微米範圍内,及在1550nm情況下衰減在〇. i86dB/km至 0· 19dB/km範圍内。 本發明第四項為波導纖維,其在中心線上相對折射率 在0.4%至1.05%範圍内。由心蕊區域中心線至心蕊與包層 界面之距離在5_ 3微米至7微米範圍内。其餘點分佈,〇<r< r〇之△(]:)%小於或等於上側邊界曲線几以及大於或等於下 側邊界曲線LM,如圖5所示。選擇上側及下側邊界曲線在 1310nm情況下產生有效面積大於或等於80平方微米以及衰 減小於0· 335dB/km以及在1550nm情況下衰減小於〇. 25dB/ km。在1550nm情況下衰減優先地小於〇· 22dB/km以及優先 地小於0. 20dB/km。 δ亥項分佈形狀精由在相對折射率百分比△(!")%與Γ曲 線上特定點界定出。特別地,A(r)%在半徑2 微米範圍内由下列值界定出。在r=l+/-〇. 1微米處△(!*)% 在0· 30%至0· 4%範圍内,在γ=1+/-0· 2微米範圍内分佈形狀 為α分佈,α·在〇· 8至1· 2範圍内。在半徑r=4+/-0· 2微米處 △(r)%在0· 23%至0. 33%範圍内。在半徑!-4+/-0. 2微米Sr $5+/-0· 2微米半徑範圍内△(!〇%為直線以及在半徑r=5+/一 0· 1微米處△(]:)%在0· 05%至0.15%範爵内。在半徑r=5+/-〇· 2微米$r^6+/-0· 2微米範圍内△〇〇%為直線,以及在半 徑6+/-0· 2微米處△(!〇%為零。 1〇_ 本紙裱尺度適用中國國家標準(CNS ) A4規格(210X297公楚) 8 (請先閲讀背面之注意事項再填寫本頁) ,ιτ 經濟部中央標準局—工消費合作社印裝 9 A7 五 '發明説明(分) 經濟部中央榡準局員工消費合作杜印製 第五項為波導纖維賴件,其具和蕊區域以 均具有各別相對折射率分佈。波導纖維由預製 。選擇賴件折射率分佈以產生具有任何實施例 、’以及結構。波導纖維尺找顺錄聽件尺寸呈 2比例難',使得特定尺相製件幾何職能夠藉由將 4纖維尺寸乘㈣當常數立即地決定丨。鱗數決定於 所需要預製件之預先選擇外徑。 、 附圖簡單說明: 第一圖(圖1)為本發明一項實施例相對折射率百分比 與半徑之曲線圖。 第二圖(圖2)為本發明一項實施例相對折射率百分比 與半徑之曲線圖。 第二圖(圖3)為相對折射率百分比與半徑之曲線圖,其 顯示出本發明一項實施例上側及下側邊界曲線。 一第四圖(圖4)為相對折射率百分比與半徑之曲線圖,其 顯示出本發明一項實施例上側及下側邊界曲線。 第五圖(圖5)為相對折射率百分比與半徑之曲線圖,其 顯示出本發明一項實施例上側及下側邊界曲線以及平均曲線。 . 第六圖(圖6)為相對折射率百分比與半徑之曲線圖,其 顯示出本發明圖5兩個實施例。 詳細說明: 波導纖維包含一系列心蕊折射率分佈設計,其產生非 常特別組合之所需要功能參數。所揭示以及所說明心蕊設475071 A7 _____ B7_ V. Description of the invention (7) Unless otherwise stated in r. The relative refractive index percentage at the point is zero. The total dispersion slope of the waveguide fiber of the present invention at 1550nm is in the range of 0.066 pS // nm2— | ^ [! To 0.06 8ps / nm2-km, and the effective area at 1550nm is in the range of go square micrometers to 85 square micrometers. Within, and at 1550nm, the attenuation is in the range of 0.186dB / km to 0.19dB / km. The fourth item of the present invention is a waveguide fiber whose relative refractive index on the center line is in the range of 0.4% to 1.05%. The distance from the center line of the core region to the interface between the core and the cladding is in the range of 5-3 micrometers to 7 micrometers. The distribution of the other points, △ (]:)% of 〈r〉 r0 is less than or equal to the upper boundary curve and greater than or equal to the lower boundary curve LM, as shown in FIG. 5. The upper and lower boundary curves are selected to produce an effective area greater than or equal to 80 square microns at 1310 nm and a attenuation reduced to 0.335 dB / km and an attenuation less than 0.25 dB / km at 1550 nm. At 1550 nm, the attenuation is preferentially less than 0.22 dB / km and preferentially less than 0.2 dB / km. The shape of the δH term distribution is defined by specific points on the relative refractive index percentage △ (! ")% and Γ curve. In particular, A (r)% is defined by the following values within a radius of 2 micrometers. △ (! *)% At r = 1 +/- 0.1 micron in the range of 0.30% to 0.4%, and the shape of the distribution in the range of γ = 1 +/- 0.2 micron is α distribution, α · In the range of 0.8 to 1.2. At a radius r = 4 +/- 0 · 2 microns, △ (r)% is in the range of 0.23% to 0.33%. Within a radius of -4 +/- 0. 2 micron Sr $ 5 +/- 0 · 2 micron radius △ (! 〇% is a straight line and at a radius r = 5 +/- 1 0.1 micron △ (] :) % Is in the range of 0.05% to 0.15%. In the range of radius r = 5 +/- 〇 · 2 microns $ r ^ 6 +/- 0 · 2 microns, △ 〇〇% is a straight line, and within a radius of 6+ / -0 · 2 micron △ (! 0% is zero. 1〇_ This paper applies the Chinese National Standard (CNS) A4 specification (210X297)) 8 (Please read the precautions on the back before filling this page), ιτ The Central Bureau of Standards of the Ministry of Economic Affairs—Industrial and Consumer Cooperative Cooperative Printing 9 A7 Five 'Invention Description (Sub) The fifth item of consumer cooperation of the Central Bureau of Standards and Commerce of the Ministry of Economic Affairs is printed on the fifth item, which is a waveguide fiber component. Respective relative refractive index distributions. Waveguide fibers are prefabricated. The refractive index distribution of components is selected to produce any embodiment with 'and structure. It is difficult to find the size of the waveguide fiber in the proportion of 2'. The geometry can be determined immediately by multiplying the 4 fiber size by a constant. The number of scales depends on the pre-selected outer diameter of the required preform. Brief description of the drawings: One figure (Figure 1) is a graph of the relative refractive index percentage and radius of an embodiment of the present invention. The second figure (Figure 2) is a graph of the relative refractive index percentage and radius of an embodiment of the present invention. (Figure 3) is a graph of relative refractive index percentage and radius, which shows the upper and lower boundary curves of an embodiment of the present invention. A fourth figure (Figure 4) is a graph of relative refractive index percentage and radius, It shows the upper and lower boundary curves of an embodiment of the present invention. The fifth graph (FIG. 5) is a graph of the relative refractive index percentage and the radius, which shows the upper and lower boundary curves of an embodiment of the present invention and The average curve. The sixth graph (Figure 6) is a graph of the relative refractive index percentage and radius, which shows the two embodiments of Figure 5 of the present invention. Detailed description: The waveguide fiber includes a series of core refractive index distribution designs. Functional parameters required to produce a very specific combination. Revealed and illustrated cardiac design
n n n n n LI -I- n n I (請先閲讀背面之注意事項再填寫本頁)n n n n n LI -I- n n I (Please read the notes on the back before filling this page)
,1T 475071 A7, 1T 475071 A7
475071 A7 B7 五 '發明説明(丨0 ) 。L-頻帶係指1570至1625nm波長範圍。在操作頻窗下總色 散優先地並不小於2ps/nm-km及色散斜率相當低小於〇 〇8 ps/nm2-km以確保由於線性色散產生有限之功率損失。由 於波導纖維線性色散越高,較長長度之系統在設計時可包 含色散補償模組或線纜長度以減小使用本發明光纖線路端 部至端部之色散。在1625nm情況下低色散斜率產生之總色 散並不大於25ps/nm-km。在1625nm情況下能夠達成色散小 於 16ps/nm-kin。 非零總色散有效地消除F丽以及正值總色散偏移訊號 之惡化,其由於SPM所致。 ~ 底下表2揭示出本發明第二實施例之特性。表1及2顯 示出大模場直徑彎曲產生之損耗比標準階躍折射率一樣良 好或比其更好。 表2 D1550 15^11 MFD Aeff 截止針鎖陣 155〇nm 側 ^ Ps/n^^ 辦 最大 13.0 0.070 10.99 89 1599 20 0· 189 0 82 最小 10.9 0.065 10.44 80 1187 5 0.187 〇· 63 經濟部中央標準局員工消費合作社印製 表3顯示·出依據本發明設計主要波導纖維特性之範圍 以及更進一步特別設計作為操作於1310nm附近之波長範圍 。由於-OH離子吸附完全地被消除,ΐ3ΐ〇ηπ^操作頻窗能夠 由 1250nm延伸至I350nm。 本紙張尺度適用中國國家標準(CNS ) A4規格(210:297公釐 /JU/i A7 B7 五 '發明説明(If ) 表3 零色散色散斜率模場截止131〇nm 波長 ps/nm2 直徑波長衰減 nra —km 微米 nm dB/km 最大 1322 0.0924 9.8 1330 0.334 最小 1301 0.088 8.8 1180 0.332 表3設計有效面積通常為8〇平方微米。表3設計之彎曲 特性與標準單模光纖例如本公司SMF-28階躍折射率一樣良 好或比其更佳。除了低衰減使該設計有利於藉由在131 Orim 波長頻窗增加頻道而提昇容量。 依據表3之本發明顯示為圖6曲線24及26。區分分佈24 以及26之特性在於各別之部份a以及A,,其具有α值為〇· 8 至1 · 3範圍之α分佈;各別之部份Β以及Β,,其為漸變斜率以 及為線性的,各別之部份C以及C,,其為陡峻斜率以及線性 的,曲線尾部D以及D’,其呈現出開口朝上之彎曲。 範例1 經濟部中央標準局員工消費合作杜印製 具有如圖1所示分佈之光纖進行模擬以尋求出功能特 性。圖1分佈為一系列分佈,其由圖3上側及下側邊界分佈 所顯示。結構參數能夠直接地由圖1讀出及包含α值約為 1之α分佈。在中心線處α分佈相對折射率百分比為q. 86% 以及延伸至半徑在1微米處△(];)%約為1微米。分佈4直線 部份啟始於α分佈最後一點以及延伸出在Γ()約為9·5微米 處與水平軸相交。依據圖1製造出波導纖維具有下列特性: -在1550nm情況下總色散為17. 9ps/nm-km; -在1550nm情況下總色散斜率為〇. 066ps/nm2_km;475071 A7 B7 Five 'Explanation of the invention (丨 0). L-band refers to the wavelength range from 1570 to 1625 nm. Under the operating frequency window, the total dispersion is preferentially not less than 2ps / nm-km and the dispersion slope is relatively low less than 008 ps / nm2-km to ensure limited power loss due to linear dispersion. Due to the higher linear dispersion of the waveguide fiber, longer length systems can be designed with dispersion compensation modules or cable lengths to reduce dispersion from end to end using the fiber optic line of the present invention. The total dispersion produced by the low dispersion slope at 1625nm is not greater than 25ps / nm-km. In the case of 1625nm, the dispersion is less than 16ps / nm-kin. The non-zero total dispersion effectively eliminates the deterioration of F and the positive total dispersion offset signal, which are caused by SPM. ~ The following Table 2 reveals the characteristics of the second embodiment of the present invention. Tables 1 and 2 show that the losses due to large mode field diameter bending are just as good or better than the standard step refractive index. Table 2 D1550 15 ^ 11 MFD Aeff cut-off pin lock array 1550nm side ^ Ps / n ^^ Office maximum 13.0 0.070 10.99 89 1599 20 0 · 189 0 82 minimum 10.9 0.065 10.44 80 1187 5 0.187 〇 63 Central Standard of the Ministry of Economic Affairs Table 3 printed by the Bureau's Consumer Cooperative shows the range of characteristics of the main waveguide fiber designed according to the present invention, and further specifically designed as a wavelength range operating around 1310 nm. Since -OH ion adsorption is completely eliminated, the ΐ3ΐ〇ηπ ^ operating frequency window can be extended from 1250nm to I350nm. This paper scale applies Chinese National Standard (CNS) A4 specification (210: 297 mm / JU / i A7 B7 Five 'invention description (If) Table 3 Zero Dispersion Slope Mode Field Cutoff 1310nm Wavelength ps / nm2 Diameter Wavelength Attenuation nra —km Micron nm dB / km Maximum 1322 0.0924 9.8 1330 0.334 Minimum 1301 0.088 8.8 1180 0.332 Table 3 Design effective area is usually 80 square microns. Table 3 Design bending characteristics and standard single-mode fiber such as our company SMF-28 order The birefringence index is as good or better than that. In addition to the low attenuation, the design is conducive to increasing the capacity by increasing the channel in the 131 Orim wavelength window. The invention according to Table 3 is shown as curves 24 and 26 in Fig. 6. Distinguishing the distribution The characteristics of 24 and 26 are the respective parts a and A, which have an α distribution in the range of α values of 0.8 to 1.3; the respective parts B and B, which are gradient slopes and linear The individual parts C and C are steep slopes and linear, and the tails D and D 'of the curve show a curved upward opening. Example 1 The consumer cooperation of the Central Standards Bureau of the Ministry of Economic Affairs As shown in Figure 1 The optical fiber is simulated to find the functional characteristics. The distribution in Figure 1 is a series of distributions, which are shown by the upper and lower boundary distributions in Figure 3. The structural parameters can be read directly from Figure 1 and include α with an alpha value of about 1. Distribution. The percentage of the relative refractive index of the α distribution at the centerline is q. 86% and it extends to a radius of 1 micron. △ (];)% is about 1 micron. The straight part of the distribution 4 starts at the last point of the alpha distribution and extends. It intersects the horizontal axis at Γ () at about 9 · 5 microns. The waveguide fiber manufactured according to Figure 1 has the following characteristics:-the total dispersion is 17.9ps / nm-km at 1550nm;-the total dispersion at 1550nm Dispersion slope is 0.066ps / nm2_km;
---- \H 本紙張尺度適用中國國家標準(CNS ) A4^i7Tl〇'x 297^^ 475071 A7 B7 經濟部中央標準局員工消費合作社印製 五、發明説明(ft) -光纖截止波長彳。為1589]1111; -在1550nm情況下模場直徑為11· 7微米; -在1550nm情況下有效面積約為103平方微米;以及 -在1550nm情況下衰減為〇. 184dB/km。 依據範例量測光纖在1550nm情況下衰減為〇. 187dB/km 以及模場直徑為13. 3微米。 範例2: 具有圖2所顯示分佈之光纖進行模擬以尋求出功能特 性。圖2分佈為一系列分佈之一,其由圖4上側及下側邊界 分佈所顯示。結構參數能夠直接地由圖2讀出及包含部份6 ,其一些點[△(〇%,r]界定出,例如[0. 64%,0],[0· 45%,1 微 米],[〇· 33%,2微米],[〇· 24°/。,3微米],[0· 15°/。,4微米],[〇· 〇 6%,5· 6微米]。部份8之階躍折射率部份啟始於5. 6微米以 及延伸以與水平軸交會於r。為11· 6微米處。依據圖1製造 出波導纖維具有下列特性: -在1550nm情況下總色散為11 · 4ps/nm-km; -在1550nm情況下總色散斜率為〇. 〇67ps/nm2-km; -光纖截止波長λ。為1515nm; -在1550nm情況下模場直徑為10. 6微米; -在1550nm情況下有效面積約為82平方微米;以及 -在1550nm情況下衰減為〇. l88dB/km。 在每一範例中在由1530nm至1565nm以及1565ηηι至1625 nm之C以及L波長頻帶範圍内具有低色散斜率以及低衰減。 這些兩個範例顯示出最佳結果,其符合以及超過所需 (請先閲讀背面之注意事項再填寫本頁) d •1 _____ 本紙張尺度適用中國國家標準(CNS〉A4規格(210,,297公釐了 14475071 A7 B7 五、發明説明(丨5 ) 要波導纖維特性。 雖然新穎的波導之特定範例已揭示出以及加以說明, •本發明只受限於下列申請專利範圍。 (請先閲讀背面之注意事項再填寫本頁) 經濟部中央標準局員工消費合作社印製 £6_ 本紙張尺度適用中國國家標準(CNS ) A4規格(210X29*7公釐)---- \ H This paper size applies to Chinese National Standard (CNS) A4 ^ i7Tl0'x 297 ^^ 475071 A7 B7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (ft)-Fiber cut-off wavelength 彳. 1589] 1111;-the mode field diameter is 11.7 microns at 1550nm;-the effective area is approximately 103 square microns at 1550nm; and-the attenuation is 0.184dB / km at 1550nm. According to an example, the fiber was measured to have an attenuation of 187dB / km and a mode field diameter of 13.3 microns at 1550nm. Example 2: An optical fiber with the distribution shown in Figure 2 was simulated to find functional characteristics. The distribution in FIG. 2 is one of a series of distributions, which is shown by the upper and lower boundary distributions in FIG. 4. The structural parameters can be read directly from Figure 2 and contain part 6, some points of which are defined by [△ (〇%, r], such as [0.64%, 0], [0.45%, 1 micron], [〇 · 33%, 2 microns], [〇.24 ° /., 3 microns], [0. 15 ° /., 4 microns], [〇.〇6%, 5.6 microns]. Part 8 The step refractive index part starts at 5.6 microns and extends to intersect with the horizontal axis at r. It is 11.6 microns. The waveguide fiber manufactured according to Figure 1 has the following characteristics:-At 1550nm, the total dispersion is 1 · 4ps / nm-km; -Total dispersion slope is 0.067ps / nm2-km in the case of 1550nm; -The cut-off wavelength λ of the fiber is 1515nm; -The mode field diameter is 10.6 microns in the case of 1550nm; The effective area is about 82 square microns at 1550 nm; and-the attenuation is 0.188 dB / km at 1550 nm. In each example, the C and L wavelength bands range from 1530 nm to 1565 nm and 1565 nm to 1625 nm. Low dispersion slope and low attenuation. These two examples show the best results, which meet and exceed the requirements (please read the notes on the back before filling this page) d • 1 _____ This paper ruler Applicable to Chinese national standards (CNS> A4 specifications (210 ,, 297 mm, 14475071, A7, B7) 5. Description of invention (丨 5) requires waveguide fiber characteristics. Although specific examples of novel waveguides have been revealed and explained, the present invention Limited to the scope of patent application below. (Please read the notes on the back before filling this page) Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs £ 6_ This paper size applies to China National Standard (CNS) A4 (210X29 * 7) Mm)
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