Abstract

We report what we believe to be the first demonstration of stable gain-switched 845nm pulse generation (Er3+: S324I1324 transition) by a weak modulated 1550nm seed laser, from an Er3+-doped fluoride fiber pumped by a cw 974nm laser diode. When the pump power of the 974nm laser diode is set to a certain value, the injection of a weak (<1mW) modulated 1550nm seed laser into the 845nm lasing cavity can depopulate the lower state I1324 of 845nm lasing, switch the gain to regulate the conventionally chaotic spiking, and generate stable synchronous 845nm pulse trains with the repetition rate up to 100kHz.

© 2008 Optical Society of America

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