Fig. 1. Experimental setup of continuous-wave laser all-fiber amplification at 915 nm using homemade Nd-doped silica fiber(LD: laser diode; NDF: Nd-doped silica fiber; CPS: cladding power stripper; QBH: quartz block holder; PM: power meter; OSA: optical spectrum analyzer)

Fig. 2. Results of 915 nm continuous-wave laser amplification. (a) Laser output power as a function of total pump power, where the inset is cross section of Nd-doped silica fiber (NDF); (b) laser spectrum after amplification