Experimental demonstration of an Er-doped fiber ring laser mode-locked with a Tm–Ho co-doped fiber saturable absorber

Abstract

Mode-locking operation of an Er-doped fiber laser with a Tm–Ho co-doped fiber saturable absorber is demonstrated for the first time. Q-switching, Q-switched mode-locking and CW mode-locking operation modes are observed sequentially with increase of the pump power. In the mode-locking operation mode, a repetition rate at the fundamental cavity frequency of 9.05 MHz is obtained with a pulse duration of 46.3 ns. By rotating the polarization controller, a repetition rate up to 887 MHz is achieved, and the pulse duration is shortened to 0.548 ns.

Modeling and Analysis of a Pulsed Er-Tm Fiber Laser System

“…As absorption bands of Tm ions overlap with the emission bands of Yb-doped fiber laser and Er-doped fiber laser [5], Tm-doped fiber and Tm-Ho codoped fiber have been used as FSAs for passive Q-switching of Yb-doped and Er-doped fiber lasers [6]- [10]. Besides, mode-locking with Tm-Ho codoped FSA has also been realized for Er-doped fiber lasers [11].…”

All-fiber multi-wavelength passiveQ-switched Er/Yb fiber laser based on a Tm-doped fiber saturable absorber

“…All-fiber multi-wavelength passive Q-switched Er/Yb fiber laser based on a Tm-doped fiber saturable absorber advantages of compactness, low adjustment requirements, and low insertion losses [1][2][3][4]. Different Q-switched lasers based on the use of an unpumped segment of rare-earth-doped fiber have been investigated [1][2][3][4][5][6][7][8][9][10][11][12][13]. Tm-doped fiber (TDF) offers three major absorption bands at 780-800 nm, 1100-1250 nm, and 1550-1750 nm.…”

A Tm–Ho codoped fiber based 38 nm wideband wavelength tunable passivelyQ-switched Er-doped fiber laser

“…In our previous work, we demonstrated the mode-locking of an Er-doped fiber laser with Tm-Ho codoped FSA [15], manifesting excellent saturable absorption characteristics of Tm-Ho codoped FSAs. In this paper, taking a piece of 0.2 m long Tm-Ho codoped fiber as the FSA, we demonstrate the stable passive Q-switching of an Er-doped fiber laser in a wide wavelength range from 1535 to 1573 nm.…”