Directly Diode-Pumped Ho:YAG Ceramic Laser

Author

Shengli Wang ; Yulong Tang ; Benxue Jiang ; Chongyuan Huang ; Nan Yang ; Hongqiang Li ; Jianlong Yang ; Jiang Li ; Yubai Pan ; Jianqiu Xu

Author_Institution

Dept. of Phys., Shanghai Jiaotong Univ., Shanghai, China

Volume

25

Issue

22

fYear

2013

fDate

Nov.15, 2013

Firstpage

2153

Lastpage

2155

Abstract

We present a Ho³⁺-doped YAG ceramic laser which is directly diode-pumped at ~ 1.13 μm for the first time. The Ho:YAG ceramic slab in this letter has a dimension of 4.2 × 4.8 × 22 mm³ and a doping concentration of 1 at%. The fiber coupled laser diode (LD) used for pumping has central wavelengths of 1.123-1.130 μm and a typical FWHM bandwidth of 5 nm. The efficient absorption of Ho:YAG ceramic is stable for broadband LD pump sources. The maximum output power was up to 1 W of continuous wave at the lasing wavelength of 2099 nm. The laser has a slope efficiency of 20.6% with respect to absorbed power and a beam propagation factor of M² ~ 4 at the maximum output power.

Keywords

ceramics; doping profiles; holmium; laser beams; laser stability; light propagation; optical pumping; solid lasers; FWHM bandwidth; Ho:YAG ceramic slab; YAG:Ho; absorbed power; beam propagation factor; broadband laser diode pump sources; diode-pumped Ho:YAG ceramic laser; doping concentration; efficiency 20.6 percent; fiber coupled laser diode; lasing wavelength; output power; slope efficiency; wavelength 1.123 mum to 1.130 mum; wavelength 2099 nm; Absorption; Ceramics; Laser excitation; Power generation; Power lasers; Pump lasers; Semiconductor lasers; Diode-pumped; Ho:YAG; ceramic; laser;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2281424

Filename

6595536