NakuLaser Blog

Overview CivilLaser offers customizable ASE light sources designed to accommodate many different telecommunications, fiber sensing, fiber optic gyroscope, and test & measurement capabilities in the near- and shortwave infrared C+L band region. An ASE (Amplified Spontaneous Emission) broadband low coherence light source is an ideal instrument for optical component spectral measurement and system compliance testing in manufacturing and R&D environments. The new generation of ASE sources have no high frequency ripples, which makes them very useful for sensor interrogation applications. What is ASE light source? ASE light source is one type of optical light sources, where the emission is generated by Amplified Spontaneous Emission. An optical gain medium emits light spontaneously when it is optically/electrically pumped, and if the pumping of the gain medium is strong enough, the “spontaneous” emission is amplified via the “stimulated” emission – this phenomenon is cal...

Abstract : A double-pass bi-directional(DP_BD) pump configuration is proposed for the high efficiency L-band ASE. A L-band ASE of 13.7 dBm output power and 38nm bandwidth of 1566~1604 nm where the ASE power intensity is higher than -16 dBm is obtained by selecting 1480 nm LD and heavily doped erbium fiber with optimized length simultaneously. The DP-BD ASE source has a pump conversion efficiency of 23.4% which is larger than that by double-pass forward (DPF) configuration of 11.8%. Introduction Broadband light source  based on erbium-doped fiber amplifying spontaneous emission (ASE) is a new type of light source with erbium-doped fiber amplifier ( EDFA ). Since the first commercial use of EDFA for all-optical amplification in 1993 has led to the rapid development of optical communication, broadband light sources based on erbium-doped fiber ASE have the same output spectrum as the 1.55" m-band of optical communication, and have The output spectrum is stable, the environment ...

Abstract: In this paper, we utilized optimized C-band and L-band amplifiers to constitute a broadband CA-L erbium-doped amplifier with a parallel structure. This amplifier has a simple configuration, high-flattened gain and low noise. Meanwhile, we have realized an amplification bandwidth of over 70 nm(1 524—1 602 nm)without any broadband gain flattening component. The C-band average gain is over 30 dB and L-band gain variation is less than 2 dB. 1.  Introduction In order to meet the growing demand for communication capacity, it is a general trend to extend the dense wavelength division multiplexing system (DWDM) from the traditional c-band (1 525 to 1 5 6 5 nm) to the L-band (1 570, 1 610 nm). . The development of C + L band ultra-wideband  erbium-doped fiber amplifiers not only doubles the bandwidth of communication, but also increases the dispersion of the system compared to other methods of increasing the transmission capacity of a single channel or reducing the chann...

A bstract :  A novel  C+ L band erbium   doped fiber broadband light so urce w ith hig h power was introduced. In the ex periment, a fiber loop mirr or made fr om 3 dB coupler   was employed, mean   while, power controlling circuit made fiber output steady. Single stage fiber and two pump LDs of 980 nm was used, and C   band amplified spontaneous emission of backw ard again enhanced   the efficiency of LD and stability o f output of fiber. Mean   while, selecting appropriate Erbium   doped fiber length simultaneously g ot output of C+ L band with power higher than 26.67 mW ( 14.26   dBm) , whose average wavelength was 1 550.887 nm. 1 Introduction SFS (superfluorescent fiber sour ce) is a low-coherence, single-transverse broadband source . It is based on amplified spontaneous emission of erbium-doped fiber, with excellent temperature stability and wide fluorescence. The spectral width, the center wavelength is in the 1 550 nm band,...