研究目的
To experimentally demonstrate two different techniques of generating frequency combs with electro-optic modulators (EOMs) around 2 μm for spectroscopic applications.
研究成果
The study successfully demonstrates two techniques for generating frequency combs with EOMs around 2 μm, enabling the creation of all-fibered dual-comb setups in the whole mid-infrared range. The results are in good agreement with the HITRAN database, validating the techniques for spectroscopic applications.
研究不足
The setups for dual-comb spectroscopy (DCS) are complex and require phase locking of two independent femtosecond lasers. The equipment commercially available at 2 μm possesses less advanced features compared to those at 1.56 μm.
1：Experimental Design and Method Selection:
The study employs two techniques for generating frequency combs with EOMs around 2 μm. The first technique involves frequency conversion of an EOM-based comb at
2：56 μm in a highly nonlinear fiber, while the second technique is based on the direct electro-optic modulation of a 2 μm continuous wave laser. Sample Selection and Data Sources:
The experiments utilize highly nonlinear fibers and a 2 μm continuous wave laser.
3：List of Experimental Equipment and Materials:
Electro-optic modulators, highly nonlinear fibers, continuous wave lasers.
4：Experimental Procedures and Operational Workflow:
The first technique involves inducing gain at a detuning of 40 THz from the original comb using fourth order modulation instability. The second technique involves spectral broadening of the comb in a highly nonlinear fiber with normal dispersion.
5：Data Analysis Methods:
The results are compared with the HITRAN database for validation.
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
