Showing papers on "Mode scrambler published in 1977"
TL;DR: To avoid deviations in characteristics due to splices a simple and effective mode scrambler was fabricated and each mode's output waveform was found to be the same as the total output wave form.
Abstract: Mode conversion at a splice was measured. Even the best splice, whose transmission loss was less than 0.01 dB, caused a mode conversion equaling about 11% of the total power. Spliced fiber transmission characteristics were influenced by the splicing conditions. To avoid deviations in characteristics due to splices a simple and effective mode scrambler was fabricated. Its insertion loss was less than 0.3 dB for a laser diode. Each mode’s output waveform was found to be the same as the total output waveform.
30 citations
TL;DR: In this paper, a mode scrambler utilizing a sinusoidal bend and a new set-up based on the attenuation-comparison method have been proposed for measuring the frequency response of an optical fiber.
Abstract: For measuring the frequency response of an optical fibre, a mode scrambler utilising a sinusoidal bend and a new set-up based on the attenuation-comparison method have been proposed. Measurements for multimode step-index fibres have revealed that the long-fibre response can be closely predicted from the short-fibre response, using an appropriate choice for the scrambler parameter.
30 citations
TL;DR: In this paper, an experimental 95% TE-TM mode conversion efficiency for an uniform longitudinal magnetization was presented for an integrated optics integrated optics system with magnetic birefringence dependence.
Abstract: TE-TM mode conversion, in magneto-optic guides for integrated optics, requires TE-TM mode overlap and phasematching. This two properties are analyzed with circular and linear magnetic birefringence dependence. In application an experimental 95% TE-TM mode conversion efficiency is presented for an uniform longitudinal magnetization.
24 citations
TL;DR: In this paper, a straightforward analysis slightly extending the work of Kawakami and Nishizawa and of Gloge and Marcatili provides some insight about the extent to which the mode differential delay in a graded-index fiber can be minimized.
Abstract: A straightforward analysis slightly extending the work of Kawakami and Nishizawa and of Gloge and Marcatili provides some insight about the extent to which the mode differential delay in a graded-index fiber can be minimized. We show that an ideal fiber (no mode mixing) with uniform mode excitation and loss and uniform material dispersion can theoretically have an rms pulse broadening due to mode differential delay as small as about 0.02LΔ2n 0 /c. We suggest that further improvement can result through recognition of differential mode loss and by accurate control of the (non-zero) rate of change of dispersion with fiber index.
12 citations
TL;DR: In this paper, a numerical solution of the coupled power equation for graded index optical fiber is derived for any launching condition, and the fiber frequency response is determined as a function of the index gradient α.
8 citations