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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0057567 (2013-10-18) |
| 등록번호 | US-8879876 (2014-11-04) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 0 인용 특허 : 312 |
There are provided optical fiber configurations that provide for the delivery of laser energy, and in particular, the transmission and delivery of high power laser energy over great distances. These configurations further are hardened to protect the optical fibers from the stresses and conditions of
There are provided optical fiber configurations that provide for the delivery of laser energy, and in particular, the transmission and delivery of high power laser energy over great distances. These configurations further are hardened to protect the optical fibers from the stresses and conditions of an intended application. The configurations provide means for determining the additional fiber length (AFL) need to obtain the benefits of such additional fiber, while avoiding bending losses.
1. A method of using a line structure for transmitting laser energy, the method comprising: a. providing a line structure,b. the line structure comprising: i. an optical fiber comprising a first end, a second end, a length (LF) defined between the first and second optical fiber ends, and a fiber cor
1. A method of using a line structure for transmitting laser energy, the method comprising: a. providing a line structure,b. the line structure comprising: i. an optical fiber comprising a first end, a second end, a length (LF) defined between the first and second optical fiber ends, and a fiber core, wherein the optical fiber has an outer radius (RF), a coefficient of thermal expansion (CTEF), and a minimum bend radius (RFmin);ii. an outer protective member around the optical fiber, the outer protective member comprising a first end, a second end, and a length (LOPM) defined between the first and second outer protective member ends at ambient temperature and with no mechanical strain, wherein the outer protective member has an inner radius (ROPM), a coefficient of thermal expansion (CTEOPM), and the ROPM is greater than the RF;iii. the first and second ends of the outer protective member and the first and second ends of the optical fiber are substantially coterminous;iv. the line structure has a predetermined temperature range for use (ΔT), a predetermined mechanical strain (ε), and when the optical fiber is wound into a coil it has a predetermined inner radius of coil (Rcoil);v. wherein the LF is greater than the LOPM, so that LP−LOPM=AFL (additional fiber length);vi. the optical fiber taking a helical non-following path within the outer protective member;vii. the AFL is equal to or between at least one of: an AFL[L] from Formulas 2 and 4 as defined in Applicants' Specification; or an AFL[%] from Formulas 1 and 3 as defined in Applicants' Specification;c. deploying the line structure;d. transmitting laser energy through the optical fiber; and,e. recovering the line structure. 2. The method of claim 1, wherein the line structure is deployed down a borehole. 3. The method of claim 1, wherein the line structure is deployed from a spool. 4. The method of claim 1, wherein the line structure is recovered to a spool. 5. A method of transmitting laser energy over a line structure, the method comprising: a. providing a line structure,b. the line structure comprising: i. an optical fiber, the fiber comprising a first end, a second end, a length (LF) defined between the first and second optical fiber ends, and a fiber core, wherein the optical fiber has an outer radius (RF), a coefficient of thermal expansion (CTEF), and a minimum bend radius (RFmin);ii. an outer protective member around the optical fiber, the outer protective member comprising a first end, a second end, and a length (LOPM) between the first and second outer protective member ends at ambient temperature and with no mechanical strain, wherein the outer protective member has an inner radius (ROPM), a coefficient of thermal expansion (CTEOPM), and the ROPM is greater than the RF;iii. the first and second ends of the outer protective member and the first and second ends of the optical fiber are substantially coterminous;iv. wherein the line structure has a predetermined temperature range (ΔT), a predetermined mechanical strain (ε), and a predetermined inner radius of coil (Rcoil);v. wherein the LF is greater than the LOPM, so that LF−LOPM=AFL (additional fiber length);vi. the optical fiber taking a sinusoidal non-following path within the outer protective member;vii. the AFL is equal to or between at least one of: an AFL[L] from Formulas 9 and 11 as defined in Applicants' Specification; or an AFL[%] from Formulas 8 and 10 as defined in Applicants' Specification;c. deploying the line structure;d. transmitting laser energy through the optical fiber; and,e. recovering the line structure. 6. The method of claim 5, wherein: ROPM is at least about 1.0 mm; RF is at least about 100 μm; the ΔT is at least about 50° C.; ε is at least about 0.01%; CTEF is at least about 0.5*10−6 (1/C); CTEOPM, is at least about 7*10−6 (1/C); LOPM is at least about 1 km; RFmin is at least about 5 cm; and, Rcoil is at least about 10 cm; wherein the configuration is capable of transmitting a laser beam having at least 1 kW of power, without substantial power loss. 7. The method of claim 5, wherein: ROPM is at least about 1.0 mm; RF is at least about 100 μm; the ΔT is at least about 50° C.; ε is at least about 0.01%; CTEF is at least about 0.5*10−6 (1/C); CTEOPM is at least about 7*10−6 (1/C); LOPM is at least about 0.5 km; RFmin is at least about 5 cm; and, Rcoil is at least about 10 cm; wherein the configuration is capable of transmitting a high power laser beam over great distances without substantial power loss. 8. The method of claim 5, wherein the fiber core has a radius greater than about 75 μm. 9. The method of claim 5, wherein the fiber core has a radius of greater than about 300 μm. 10. A method of transmitting laser energy over an optical fiber configuration, the method comprising: a. providing a line structure,b. the line structure comprising: i. an optical fiber, a portion of the optical fiber comprising a first end, a second end, a length (LF) defined between the first and second optical fiber ends, and a fiber core, wherein the optical fiber has an outer radius (RF), a coefficient of thermal expansion (CTEF), and a minimum bend radius (RFmin);ii. an outer protective member around the optical fiber portion, a portion of the outer protective member comprising a first end, a second end, and a length (LOPM) defined between the first and second outer protective member ends at ambient temperature and with no mechanical strain, wherein the outer protective member has an inner radius (ROPM), a coefficient of thermal expansion (CTEOPM), and the ROPM is greater than the RF;iii. the first and second ends of the outer protective member and the first and second ends of the optical fiber are substantially coterminous;iv. the optical fiber configuration has a predetermined temperature range (ΔT), a predetermined mechanical strain (ε), and a predetermined inner radius of coil (Rcoil);v. wherein the LF is greater than the LOPM, so that LF−LOPM=AFL (additional fiber length);vi. the optical fiber taking a helical non-following path within the outer protective member; and,vii. the AFL is equal to or between at least one of: an AFL[L] from Formulas 2 and 4 as defined in Applicants' Specification; or an AFL[%] from Formulas 1 and 3 as defined in Applicants' Specification;viii. whereby, the optical fiber configuration is capable of transmitting at least about 1 kW of laser energy over great distances without substantial bending losses;c. deploying the line structure;d. transmitting laser energy through the optical fiber; and,e. recovering the line structure. 11. A method of transmitting laser energy over an optical fiber configuration, the method comprising: a. providing a line structure,b. the line structure comprising: i. an optical fiber, a portion of the fiber comprising a first end, a second end, a length (LF) defined between the first and second optical fiber ends, and a fiber core, wherein the optical fiber has an outer radius (RF), a coefficient of thermal expansion (CTEF), and a minimum bend radius (RFmin);ii. an outer protective member around the optical fiber portion, a portion of the outer protective member comprising a first end, a second end, and a length (LOPM) between the first and second outer protective member ends at ambient temperature and with no mechanical strain, wherein the outer protective member has an inner radius (ROPM), a coefficient of thermal expansion (CTEOPM), and the ROPM is greater than the RF;iii. the first and second ends of the outer protective member and the first and second ends of the optical fiber are substantially coterminous;iv. wherein the optical fiber configuration has a predetermined temperature range (ΔT), a predetermined mechanical strain (ε), and a predetermined inner radius of coil (Rcoil);v. wherein the LF is greater than the LOPM, so that LF−LOPM=AFL (additional fiber length);vi. the optical fiber taking a sinusoidal non-following path within the outer protective member;vii. the AFL is equal to or between at least one of: an AFL[L] from Formulas 9 and 11 as defined in Applicants' Specification; or an AFL[%] from Formulas 8 and 10 as defined in Applicants' Specification;viii. whereby, the optical fiber configuration is capable of transmitting at least about 1 kW of laser energy over great distances without substantial bending losses;b. deploying the line structure;c. transmitting laser energy through the optical fiber; and,d. recovering the line structure.
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