High repetition frequency modulation cobalt-doped Q spinel crystal capable of being used for 1.5 micron wave band

Abstract

The invention discloses a high repetition frequency modulation cobalt-doped Q spinel crystal capable of being used for a 1.5 micron wave band, the cobalt-doped Q spinel crystal is prepared from the following components according to a chemical dosage ratio: Co2O3 x%: MgO (1-x%): 3Al2O3, the ratio of cobalt oxide to magnesium oxide to aluminum oxide is x%: 1-x%: 3, and x=0-0.5. The cobalt-doped Q spinel crystal has the following beneficial effects that when cobalt oxide, magnesium oxide and aluminum oxide are selected to prepare the cobalt-doped Q spinel single crystal, the conversion efficiency of the cobalt-doped Q spinel crystal in the 1.5-micron wave band is high, the cost is moderate, according to the cobalt-doped Q spinel crystal, cobalt-doped aluminum-rich spinel is prepared from the cobalt oxide, the magnesium oxide and the aluminum oxide, as a 1.5-micron waveband laser Q-switching basic material, the unique passive Q-switching crystal material is good in comprehensive performance, low in production cost, convenient to grow, high in Q-switching efficiency and capable of achieving 500 kHz high repetition frequency.

Description

technical field [0001] The invention relates to the field of laser communication, in particular to a cobalt-doped Q spinel crystal that can be used for high frequency modulation in the 1.5 micron wave band. Background technique [0002] The 1.56μm band femtosecond pulsed laser has a wide range of application values ​​in the fields of laser communication, medical diagnosis, micro-nano processing, precision measurement, etc., especially through the optical frequency doubling technology, the 1.56μm frequency doubling laser can work in the output band of the Ti:Sapphire laser, To further expand its application scenarios, currently, Ti:Sapphire oscillators and amplifier products are mature, and have significant index advantages in terms of extremely short pulses (<20fs) and ultra-large energy (>1mJ). Compared with Ti:sapphire lasers, doped Erbium fiber femtosecond laser products have significant cost-effective advantages in terms of 50-100fs pulse width and <10nJ single ...

AI Technical Summary

Problems solved by technology

[0006] Preferably, different from the two relatively mature Q-modulated crystals MgAlO and LaMgAlO, the cobalt-doped Q spinel crystal is prepared from cobalt oxide, magnesium oxide and aluminum oxide raw materials to prepare cobalt-doped aluminum-rich spinel, as Q-switched laser crystal and glass basic materials, the unique passive Q-switched crystal material overcomes the shortcomings of the poor comprehensive performance of the passive Q-switched crystal material doped with Co ions used in the prior art, and improves the high production cost and difficult growth , the Q-switching efficiency is low, some crystals also have anisotropy and other characteristics, and the conversion efficiency is 20% higher than that of similar products. The passive Q-switching crystal Co: Spinel meets the application requirements. The passive Q-switching crystal material has a strong Absorption, the effective saturable absorption band covers 1.3-1.6μm, has good saturable absorption characteristics, and is applied to 1.34μm lasers, especially the passive Q-switching switch of 1.544μm eye-safe lasers