Simple technique for measuring Raman gain efficiency spectrum distribution in a single-mode fiber

2009 ◽  
Author(s):  
Yasuhiro Tsutsumi ◽  
Masaharu Ohashi
Keyword(s):  
Simple Technique ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Raman Gain ◽  
Spectrum Distribution

NUMERICAL COMPARISON OF MULTI-PUMP RAMAN AMPLIFIERS BASED ON PHOTONIC CRYSTAL FIBER AND STANDARD SINGLE MODE FIBER

2007 ◽  
Vol 21 (02n03) ◽  
pp. 115-122
Author(s):  
TAO SHANG ◽  
JIANPING CHEN ◽  
XINWAN LI ◽  
JUNHE ZHOU
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Single Mode ◽  
High Gain ◽  
Gain Medium ◽  
Single Mode Fiber ◽  
Numerical Comparison ◽  
Raman Gain ◽  
Crystal Fiber ◽  
Raman Amplifiers

This paper presents a numerical analysis and comparison on the performance of multi-pump gain-flat Raman amplifiers based on triangular photonic crystal fiber and conventional fiber. It is demonstrated that the extra 5.93 dB Raman net gain can be achieved in the L-band when PCF acts as Raman gain medium. The noise performance of the two amplifiers are also calculated and compared. Comparison with the data of published literature was also carried out to verify our analysis. The results showed that PCF is the appropriate candidate for high gain Raman amplifiers.

TiO2-Doped Single-Mode Fiber as Active Material for Raman Lasers

2017 ◽  
Vol 753 ◽  
pp. 173-179 ◽  
Author(s):  
Georgii S. Felinskyi ◽  
Iryna V. Serdeha ◽  
Valeriy I. Grygoruk
Keyword(s):  
Spectroscopic Analysis ◽  
Active Material ◽  
Single Mode ◽  
Analytic Form ◽  
Single Mode Fiber ◽  
Fiber Types ◽  
Raman Gain ◽  
Raman Lasers ◽  
Gain Profile ◽  
Gain Threshold

The properties of TiO2-doped fiber are considered as optoelectronic material in our work. The advantages of such fiber have been studied with the aim of its application to active medium in Raman fiber lasers. The comparison of spontaneous Raman spectra and corresponding gain profiles in TiO2-doped and GeO2-doped fiber is presented. Raman gain profiles were obtained over a broad spectral range of Stokes shifted frequencies up to 1400 cm-1(42 THz). The spectral decomposition using multimode Gaussian components has been performed for both Raman gain profiles. High accuracy analytic form of Raman gain profile of TiO2-doped fiber is obtained using 12 components. The pump power of Raman gain threshold is introduced as the function of wavelength within the telecommunication windows for both fiber types. Our spectroscopic analysis allows presenting the numerical results on lasing bandwidth and Raman gain threshold inTiO2-doped single-mode fiber. It has been shown that the lasing bandwidth in TiO2-doped fiber may be almost twice wider than the lasing bandwidth in standard GeO2-doped fiber.

scholarly journals Impact of Combine Dithering and Modulators to Mitigate Noise in Radio Over Fiber System

2018 ◽  
Vol 12 (1) ◽  
pp. 428
Author(s):  
Fakhriy Hario ◽  
Eka Maulana ◽  
Hadi Suyono ◽  
Rini N Hasanah ◽  
Sholeh H Pramono
Keyword(s):  
Optical Fiber ◽  
Group Velocity Dispersion ◽  
Nonlinear Problems ◽  
Single Mode ◽  
Optical Amplifier ◽  
High Light Intensity ◽  
Single Mode Fiber ◽  
Radio Over Fiber ◽  
Fiber System ◽  
Spectrum Distribution

<p>A well-prepared Radio over Fiber (RoF) is a technology that combines two transmission technologies, radio and optical fiber transmissions. The study focused on the characteristics and problems of the optical fiber medium. One of the problems in the optical fiber is the effect of nonlinear characteristic, which caused by the high light intensity in the optical fiber core with extended interaction area in a single mode fiber (SMF). This characteristic reduces the output width and creates a pulse broadening. The nonlinear characteristics discussed in this study focused on SPM (self-phase modulation) and GVD (Group Velocity Dispersion). To overcome the nonlinear problems, this study presented a method to make the noise-resistant transmitted signal and improve the optical fiber power range. The fundamental of this study was developing similarities of previous studies regarding nonlinearity in the optical fiber. The results show that the use of two modulators combined with the amplification generated the signal with smoother spectrum, which means that the spectrum distribution was more uniform. There was 61.5 % increase of the peak power of the output signal after amplification using an optical amplifier.</p>

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