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Single-mode unidirectional microcavity laser
Optics Letters, 2017In this Letter, we report a suspended whispering gallery mode microdisk with a hole pierced through its surface. The novel disk is made up of Rhodamine B-doped resin, which is fabricated by femtosecond laser direct writing technology. The pierced microcavity achieves highly directional emission of single-mode lasing with a far field divergence angle of
Zhen-Nan, Tian +5 more
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Single-mode surface plasmon laser
Conference on Lasers and Electro-Optics (CLEO 2000). Technical Digest. Postconference Edition. TOPS Vol.39 (IEEE Cat. No.00CH37088), 2000Surface-plasmon modes confined at the interface between a metal and a semiconductor are exploited in place of conventional dielectric waveguides for the realization of a λ∼17 μm semiconductor laser. The device is based on the quantum cascade concept and outperforms with its 38 mW of peak output power and 240 K of maximum operating temperature any ...
Tredicucci A +5 more
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Single-Nanowire Single-Mode Laser
Nano Letters, 2011We demonstrate single-mode laser emission in single nanowires. By folding a 200 nm diameter CdSe nanowire to form loop mirrors, single-mode laser emission around 738 nm wavelength is obtained with line width of 0.12 nm and low threshold. The mode selection is realized by the vernier effect of coupled cavities in the folded nanowire.
Yao, Xiao +8 more
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Passive single-mode fiber depolarizer
Applied Optics, 1999We analyze and demonstrate a passive single-mode fiber depolarizer by using cascaded 2 x 2 couplers, recirculating delay lines, and a commercial laser diode. Design criteria and principles are discussed. We reduced the degree of polarization (DOP) to less than 20 dB by using ten cascaded couplers. The DOP can be reduced even further with more couplers.
P, Shen, J C, Palais
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Single-Mode Fiber-Type Polarizer
IEEE Transactions on Microwave Theory and Techniques, 1982The simple and novel fabrication technique of the fiber-type polarizer has been demonstrated and the polarization characteristics of the polarizer have been investigated. The polarizer structure consists of the eccentric core and the metal coat on the thin buffer layer whose thickness is controlled by chemical etching.
T. Hosaka, K. Okamoto, J. Noda
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All-single-mode fiber resonator
Optics Letters, 1982An all-fiber-ring resonator has been constructed using a single strand of single-mode optical fiber and a directional coupler. Derivation of the resonator finesse in terms of fiber and directional coupler parameters is given. A finesse of 80 has been achieved experimentally. Applications of such a fiber-ring resonator are discussed.
L F, Stokes, M, Chodorow, H J, Shaw
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1997
Without additional frequency selecting elements, most lasers utilizing linear resonators emit at several axial modes. A resonator operating in a single transverse mode, exhibits a frequency spectrum which consists of multiple lines. If we neglect the frequency pulling induced by the gain profile, these emission lines are spectrally separated by c 0/(2L)
Norman Hodgson, Horst Weber
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Without additional frequency selecting elements, most lasers utilizing linear resonators emit at several axial modes. A resonator operating in a single transverse mode, exhibits a frequency spectrum which consists of multiple lines. If we neglect the frequency pulling induced by the gain profile, these emission lines are spectrally separated by c 0/(2L)
Norman Hodgson, Horst Weber
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Single-mode-fiber saturable absorber
Optics Letters, 1984Saturable absorption is performed on a signal in a single-mode fiber by allowing the evanescent field of the guided wave to interact with a saturable-absorbing dye. The evanescent field is exposed by mechanically removing a portion of the fiber cladding. The saturable material is then placed in close proximity to the fiber core.
W V, Sorin +3 more
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2017
This chapter develops the computational algorithm for determining the most probable value (MPV) and covariance matrix of modal parameters in Bayesian operational modal analysis with data in a single setup and for well-separated modes. The MPV of the mode shape is analytically derived in terms of other parameters, which effectively reduces the numerical
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This chapter develops the computational algorithm for determining the most probable value (MPV) and covariance matrix of modal parameters in Bayesian operational modal analysis with data in a single setup and for well-separated modes. The MPV of the mode shape is analytically derived in terms of other parameters, which effectively reduces the numerical
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Single mode optical fiber sensors
1995Single mode fibers are used for sensing when extreme sensitivity is required or when a well defined polarization of light is needed at a remote sensing point. Most sensors which use single mode fibers are of the intrinsic type (i.e. the action of the measurand on the light occurs within the fiber itself). The sensitivity advantage of single mode fibers
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