KEYWORDS: Fiber amplifiers, Time division multiplexing, Raman spectroscopy, Signal to noise ratio, Interference (communication), Optical amplifiers, Signal processing, Optical engineering, Signal attenuation, Optical fibers
We report the transmission of signal light and the noise accumulation in the fiber Raman amplifier (FRA) under four-wavelength time-division multiplexing (TDM) pumping. A quality factor that is used to describe the performance of the Raman fiber amplifier system in quantitative analysis is proposed. The results indicate that the power variation of signal light has a certain periodicity that is related to the period of pumping with the TDM pumping. The shorter the pumping period is, the weaker the signal fluctuation is. Through the analysis of noise, it is found that amplified spontaneous emission is the main source of the noise of FRA with TDM-pumping. By comparing the TDM pump scheme with the continuous multiwavelength pump scheme, it is found that the gain of the TDM pump scheme is higher than that of the continuous multiwavelength pump scheme.
In this paper, the circuit design of 1470nm pumped laser required by fiber Raman amplifier is carried out, which solves the problem that the output optical power and wavelength of the laser are easily affected by temperature and drive current fluctuations. Compared with the existing circuit design, the circuit design in this paper simplifies the circuit topology structure, reduces the cost, ensures the working stability, and broadens the working linear area of constant current source. The current 1A is continuously adjustable, and the maximum relative error of current in one hour is 0.03% at 25°C. A chipset MAX1978 is adopted to realize temperature control, and the temperature control precision reaches 0.01°C. Finally, a high-precision semiconductor laser driving system with power supply of 5V and driving current of 1A is realized.
The transmission of signal light and the noise accumulation in the fiber Raman amplifier (FRA) under 4-wavelength timedivision multiplexing (TDM) pumping is studied. The power variation of signal light has a certain periodicity which is related to the period of pumping. The shorter the pumping period is, the weaker the signal fluctuation is. Through the analysis of noise, it is found that amplified spontaneous emission (ASE) is the main source of the noise of FRA with TDMpumping. By comparing the TDM pump scheme with the continuous multi-wavelength pump scheme, it is found that the gain of the TDM pump scheme is higher than that of the continuous multi-wavelength pump scheme.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.