A Multidimensional Multiplexing Mode-Locked Laser Based on a Dual-Ring Integrative Structure for Tri-Comb Generation

Abstract

The tri-comb-based multi-heterodyne detection technique has been proven to be a powerful tool for precision metrology, e.g., laser ranging and spectroscopy. However, in existing tri-comb generation methods, it is difficult to provide a large and variable difference in tri-comb repetition rates. In this paper; we propose a multidimensional multiplexing mode-locked laser based on a dual-ring integrative structure. Combining the dimensions of sub-ring multiplexing and wavelength multiplexing, two modes of tri-comb generation can be achieved with the dual-ring single cavity laser. The generated combs are identified based on the relative intensity of the pulse trains and optical spectrum, and the repetition rates of dual-combs from the same sub-ring are distinguished based on dispersion analysis. With repetition rates of approximately 47 MHz and 49.6 MHz, the minimum and maximum repetition rate difference of the generated tri-comb can be changed from 2.38 kHz and 2.59526 MHz to 2.74 kHz and 2.59720 MHz merely by switching the operation mode of the dual-ring integrated mode-locked laser. The obtained results indicate that our method can offer a powerful scheme for future multi-comb generation and its application in multi-heterodyne detection-based laser ranging and spectroscopy.

Fiber laser cavity with dynamically transformable topology for switchable bidirectional pulse generation

“…Bidirectional fiber lasers are promising tool and basis for high-sensitivity gyroscopic applications [8,9], for particular spectroscopic methods (e.g. asynchronous optical sampling) [10], for coherent sources with multidimensional multiplexing of laser radiation parameters [11,12]. However, the known configurations of such lasers are not transformable.…”

Accurate and Comprehensive Spectrum Characterization for Cavity-Enhanced Electro-Optic Comb Generators

“…Its unique property in the frequency and time domains brings revolutionary development in the fields of precision spectroscopy [ 3 , 4 , 5 ], optical communication [ 6 , 7 ], waveform synthesis [ 8 , 9 , 10 ], and precision metrology [ 11 , 12 , 13 ] etc. Compared to the OFC generation schemes based on mode-locked lasers [ 14 , 15 , 16 ] and micro-resonator lasers [ 17 , 18 ], the electro-optic modulators (EOMs)-based OFC generators have some unique advantages [ 19 , 20 ]. OFCs with a high repetition rate up to tens of GHz can be conveniently obtained with a robust and compact setup.…”