Passively modelocked fiber laser using carbon nanotubes

A fiber laser and passive mode-locking technology, which is applied to lasers, laser components, phonon exciters, etc., can solve the problem that lasers cannot generate pulse width, etc., and achieve the effect of reducing cavity length, reducing overall length, and increasing repetition frequency
CN101714738AInactive Publication Date: 2010-05-26OFS FITEL LLC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
OFS FITEL LLC
Publication Date
2010-05-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention a passively modelocked fiber laser using carbon nanotubes. The passively modelocked fiber laser utilizes a rare-earth-doped fiber section as the gain medium, which exhibits a relatively high absorption (e.g., peak pump absorption > 50 dB / m) and relatively low dispersion (e.g., -20 ps / km-nm < D g < 0). Passive modelocking is provided by a single-walled carbon nanotube (SWNT) saturable absorber, formed on endface portions of a section of un-doped fiber. The remaining components (input / output couplers, isolator) are preferably integrated into a single component and coupled to the un-doped optical fiber. This combination yields a laser cavity with a slightly anomalous overall dispersion, preferred for soliton generation and creating optical pulses with a sub-picosecond pulse width and repetition frequency over 100 MHz.
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Description

[0001] Cross References to Related Applications

[0002] This application claims the benefit of US Provisional Application No. 61 / 099978, filed September 25, 2008, which is hereby incorporated by reference. technical field

[0003] The present invention relates to a passively mode-locked fiber laser, and more particularly, to a fiber laser using a carbon nanotube saturable absorber integrated with an optical fiber to generate a short pulse width and high repetition rate fiber laser. Background technique

[0004] Passively mode-locked fiber lasers are known to be reliable sources of ultrashort pulses (eg, pulses less than picosecond in width). In addition to ultrashort pulse widths, lasers with high pulse repetition frequencies (eg, several hundred MHz) can also be used in applications such as frequency metrology and high-speed optical sampling. For practical purposes, these sources must be compact, reliable and require minimal power consumption. Mode-locked erbium-doped fi...

Claims

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