Growth and spectroscopic properties of Nd3+-doped PbMoO4 laser crystals

Abstract

Lead molybdate (PbMoO4, PMO) crystal is a multifunctional material with diverse applications in acoustic-optics, scintillation and lasers. Herein, transparent 1 mol% and 2 mol% Nd3+-doped PMO crystals were readily grown via the Bridgman method, with dimensions of Φ 25.6 mm × 60 mm. The effective segregation coefficients of Nd3+ ions for the 1 mol% and 2 mol% Nd3+:PMO crystals were 0.58 and 0.63, respectively. The optical and fluorescence spectra were evaluated in detail, and the spectroscopic properties were determined using the Judd–Ofelt (J–O) theory. For 1 mol% Nd3+:PMO crystals, the absorption cross-section at 804 nm was 13.81 × 10−20 cm2, with an FWHM of 20.3 nm. The absorption cross-section and FWHM at 804 nm were calculated to be 9.29 × 10−20 cm2 and 14.8 nm for 2 mol% Nd3+:PMO crystals, respectively. Additionally, the emission cross-sections at 1.06 μm were calculated as 12.71 × 10−20 cm2 and 12.79 × 10−20 cm2 for 1 mol% and 2 mol% Nd3+:PMO crystals, respectively. The fluorescence decay time was moderately decreased from 145.84 μs (1 mol% Nd3+:PMO crystal) to 137.83 μs (2 mol% Nd3+:PMO crystal). Compared with other Nd3+ ion-doped laser gain medium, Nd3+:PMO crystals were featured with relatively larger absorption cross-sections and emission cross-sections and longer decay times. This work provides a deeper insight into the design of novel laser crystals in the near infrared region.

Graphical abstract: Growth and spectroscopic properties of Nd3+-doped PbMoO4 laser crystals

Article information

Article type
Paper
Submitted
08 Feb 2025
Accepted
04 Jul 2025
First published
23 Jul 2025

CrystEngComm, 2025, Advance Article

Growth and spectroscopic properties of Nd3+-doped PbMoO4 laser crystals

Z. Dai, Y. Huang, M. Wang, H. Shen and J. Xu, CrystEngComm, 2025, Advance Article , DOI: 10.1039/D5CE00137D

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