研究目的
To demonstrate simultaneous generation of over 316 wavelengths in S, C and L bands from two lasers spaced 4 nm apart in the C-band using electro-optic modulators and cascaded four-wave mixing in highly nonlinear fiber.
研究成果
The system demonstrated simultaneous generation of over 316 lasers in S, C, and L bands from two lasers in C-band, achieving a scale-up in distinct spectral sources by a factor of 158. The electro-optic comb generation increases the SBS threshold, allowing power scaling and subsequent increased four-wave mixing. The system can act as a single source for applications in DWDM and arbitrary RF waveform generation.
研究不足
The power scaling is primarily limited by stimulated Brillouin scattering (SBS), which can back-reflect additional power and potentially damage equipment. Without initial comb generation, the HNLF needs to be strained to increase SBS threshold.
1：Experimental Design and Method Selection:
The experiment involves using two independent laser sources at 1548 nm and 1552 nm, combined with a 50/50 coupler, and undergoing sinusoidal intensity and phase modulation at 25 GHz in lithium niobate electro-optic modulators. The modulated signals are then power scaled to ~800 mW and undergo cascaded four-wave mixing in a highly nonlinear fiber (HNLF) to generate wavelengths in S, C, and L bands.
2：Sample Selection and Data Sources:
Two laser sources with linewidths ~100 kHz are used.
3：List of Experimental Equipment and Materials:
Lithium niobate electro-optic modulators, Erbium-Ytterbium co-doped fiber amplifier, highly nonlinear fiber, 50/50 coupler, 90/10 coupler, polarisation controllers, microwave attenuators, power splitters, and amplifiers.
4：Experimental Procedures and Operational Workflow:
The lasers are combined and modulated, then amplified and passed through HNLF for four-wave mixing. A portion of the output power is extracted to measure the spectrum.
5：Data Analysis Methods:
The spectrum is analyzed to count the number of lines in 20 dB bandwidth in S, C, and L bands.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
lithium niobate electro-optic modulators
Modulate the phase and intensity of laser light for frequency comb generation.
-
Erbium-Ytterbium co-doped fiber amplifier
Amplify the initial comb lines to nearly 800 mW for cascaded four-wave mixing.
-
highly nonlinear fiber
Facilitate cascaded four-wave mixing to generate wavelengths in S, C, and L bands.
-
50/50 coupler
Combine two independent laser sources.
-
90/10 coupler
Extract a portion of the output power to measure the spectrum.
-
polarisation controllers
Align the laser polarisation to lithium niobate modulator axis.
-
microwave attenuators
Ensure the modulators receive enough driving power.
-
power splitters
Split the RF signal to feed the cascaded modulators.
-
amplifiers
Amplify the RF signal to drive the modulators.
-
登录查看剩余7件设备及参数对照表
查看全部
