Topic
Mode scrambler
About: Mode scrambler is a research topic. Over the lifetime, 896 publications have been published within this topic receiving 13595 citations.
Papers published on a yearly basis
Papers
More filters
Patent•
23 May 2005
TL;DR: In this article, a single-mode light source with an external cavity was proposed, which consists of a laser diode, an integrated lens, and an optical fiber with an incidence surface cleaved at a predetermined angle, such that a portion of the light emitted from the diode is reflected to return to the optical diode.
Abstract: The present invention relates to a single mode light source device having an external cavity. The single mode light source device according to the present invention includes a laser diode, an integrated lens, and an optical fiber. The optical fiber has an incidence surface cleaved at a predetermined angle, such that a portion of light emitted from the laser diode is reflected to return to the laser diode. An internal cavity embedded in the laser diode is combined with an external cavity, thereby selecting only an optical signal of a single mode (wavelength) and outputting the selected optical signal. The external cavity is formed between a light emitting surface of the laser diode using multi mode oscillation and the incidence surface of the optical fiber. According to the present invention such constructed, the single mode light source can be embodied easily at a low price and also can be used as a variable wavelength light source.
1 citations
1 citations
19 Feb 2015
TL;DR: In this article, a flat-top beam-shaping device based on micro-structured optical fiber (MOF) has been designed to reduce the nonlinear effects in optical fiber effectively and make energy output of the light beam much more uniformly.
Abstract: In order to reduce the nonlinear effects in optical fiber effectively and make energy output of the light beam much more uniformly, a flat-top beam-shaping device based on micro-structured optical fiber (MOF) has been designed in this paper. Output of flat-top fundamental mode is realized by introducing a low refractive index inner core in the refraction-guiding MOF. Based on this principle, output performance of flat-top MOF is simulated and alayzed with the Rsoft. The structure parameters of the flat-top MOF are obtained after optimization, and the diameter of the corresponding mode field is 10.37 μm and the defect degree is 0.16%. These results show that the flat-top fundamental mode with large mode area can be carried out in the designed MOF, and moreover, they also provide theoretical basis for the fabrication of the flat-top MOF.
1 citations
TL;DR: In this article, it is shown that intensity dependent mode coupling is induced by nonlinear birefringence between two orthogonally polarized modes in optical fibers in such way that the weak light field polarized along the slow axis of the bireringent fiber couples more strongly to the other mode having the perpendicular polarization than to the strong light field.
Abstract: It is theoretically shown that intensity dependent mode coupling is induced by nonlinear birefringence between two orthogonally polarized modes in optical fibers in such way that the weak light field polarized along the slow axis of the birefringent fiber couples more strongly to the other mode having the perpendicular polarization than to the strong light field By utilizing the mode coupling property it is possible in a birefringent single‐mode fiber to isolate the optical pulse launched, say, in the LPx01 mode from the precursor and tailing edges or weak background by coupling them to the LPy01 mode This will readily lead to the application of birefringent fibers to optical pulse compression In this scheme of pulse reshaping, the loss of the LPy01 mode is required to be much larger than that of the LPx01 mode in order to avoid the unnecessary coupling back to the main mode
1 citations
TL;DR: In this article, a combination of TE10-TE20 mode converters is proposed to pass the TE10 mode at frequencies lower than 2fc and convert the TE40 mode at higher frequencies.
Abstract: Dielectric rod arrays in a metallic waveguide alter the propagation modes and group velocities of electromagnetic waves We focus on TE10-to-TE20 mode converters and investigate the variation in their behavior with frequency In this investigation, a mode converter is proposed that passes the TE10 mode at frequencies lower than 2fc, and converts the TE10 mode into the TE40 mode for frequencies higher than 2fc, which is achieved by a combination of TE10-TE20 mode converters
1 citations