GHz-level repetition rate synchronously pumped diamond Raman laser based on bidirectional gain

In this paper, we demonstrate an ultrafast diamond Raman laser at 1240 nm with a pulse repetition rate of 956.62 MHz, a pulse duration of 39.5 ps, and an average power of up to 3.3 W based on synchronous pumping. The pump source is an electrical-pulse-modulated picosecond pulsed laser at 1064 nm wit...

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Bibliographic Details
Published in:Applied physics letters 2024-07, Vol.125 (4)
Main Authors: Zhu, Chengjie, Yang, Xuezong, Liu, Yuxuan, Li, Muye, Sun, Yuxiang, Fang, Jiajie, Chen, Dijun, Chen, Weibiao, Feng, Yan
Format: Article
Language:English
Subjects:
Amplification
Compression ratio
Diamonds
Laser applications
Laser pumping
Lasers
Pulse duration
Pulse repetition rate
Pulsed lasers
Raman lasers
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Summary:In this paper, we demonstrate an ultrafast diamond Raman laser at 1240 nm with a pulse repetition rate of 956.62 MHz, a pulse duration of 39.5 ps, and an average power of up to 3.3 W based on synchronous pumping. The pump source is an electrical-pulse-modulated picosecond pulsed laser at 1064 nm with a repetition rate of 239.16 MHz and a pulse duration of 65.4 ps. A quadrupling repetition rate of the Raman pulse is achieved by synchronously amplifying both the forward and backward Raman pulses and the amplified Raman pulse undergoing two round trips in the resonator within one pump pulse period. The compression ratio of the pulse duration from the pump to the Raman is 1.66. This work offers a convenient and efficient method to significantly enhance the repetition rate of ultrafast crystalline Raman lasers and proves that a non-coherent ultrafast pump pulsed laser can be converted to a coherent mode-locked ultrafast Raman pulsed laser based on Raman conversion.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0217381