Temperature impairment characterization in radio-over-multimode fiber systems

Abstract

Abstract. Arbitrary operating conditions, such as the temperature depen-dence in the fiber link impose a challenge for the extension of radio-over-multimode fiber techniques. Temperature impairment characterization is analyzed over the broadband transmission bands that can be present in the frequency response of multimode fiber (MMF) supporting multiple-GHz carriers delivering schemes. Experimental results show that these transmission bands are dramatically influenced by the hysteresis of heating and cooling temperature cycles, respectively. The influence of the MMF graded index exponent tolerance on frequency response at higher bands is also analyzed. And this variation can be directly attributed to environmental temperature changes that could affect the MMF link. Additionally, selective mode-launching schemes combined with the use of narrow line-width optical sources are experimentally demonstrated to enable broadband transmission, not only at short but also at middle-reach distances over MMFs.Subject terms: multimode fiber; temperature dependence; radio-over-fiber; frequency response.

Multimode Graded-Index Optical Fibers for Next-Generation Broadband Access

“…The α-dispersion is imposed by the dopant and its concentration, so this impairment is not easy to overcome. Furthermore, these latter parameters can also be affected by temperature impairments, as recently reported in [84]. Frequency responses are displayed in Fig.…”

“…(a) Theoretical and measured frequency response of a 3km-and 6km-long silica based GI-MMF link with a FP laser source operating at 1300nm. (b) Theoretical and measured frequency response of a 9km-long silica-based GI-MMF link with a DFB laser source operating at 1550nm [84].…”

Multimode fibers in millimeter-wave evolution for 5G cellular networks

“…Some measurements showing MMF propagation capabilities beyond baseband bandwidth at long link lengths have been reported along with temperature impairment characterization over the broadband transmission bands [9]. The thermal coefficient of around reported [17].…”

“…Radio over multimode fiber technologies have been proposed in-building networks [5] for the distribution of optical wireless communication cells [6] as well as in broadband access networks [7], [8]. Temperature impairment characterization has also been analyzed over the broadband transmission bands that can be present in the frequency response of multimode fiber (MMF) are to support multiple-GHz carriers delivering schemes [9]. Measurements of *cvazquez@ing.uc3m.es; …”