TY - GEN
T1 - Passively mode-locked short-cavity 10GHz Er:Yb-codoped phosphate-fiber laser using carbon nanotubes
AU - Yamashita, Shinji
AU - Yoshida, Takeshi
AU - Set, Sze Y.
AU - Polynkin, Pavel
AU - Peyghambarian, Nasser
PY - 2007
Y1 - 2007
N2 - Passively mode-locked fiber lasers are the best pulsed sources available today due to their simplicity and their ability to generate transform-limited pulses in the picosecond regimes. A drawback of the conventional passively mode-locked fiber lasers is that the pulse repetition rate is relatively low, at best a few tens of MHz, because of long cavity length. In order to raise repetition rate up to a few GHz, the cavity length has to be shortened below a few centimeters. Fiber lasers with such a short cavity require a high gain fiber and a small saturable absorber with low loss. Recently, the authors have proposed and demonstrated a small and low-loss saturable absorber device incorporating carbon nanotubes (CNT). Using CNT, we have realized very stable 2cm-long, 5GHz mode-locked Er:Yb-codoped silica-fiber laser, but the output power was limited to ∼0.2mW due to insufficient gain in the Er:Yb-codoped silica-fiber. Here we used heavily Er:Yb-codoped phosphate fiber to form 1 cm-long cavity with fiber mirrors, and succeeded in generating stable pulse trains with output power as high as 30mW and repetition rate as high as 10GHz at 1535nm.
AB - Passively mode-locked fiber lasers are the best pulsed sources available today due to their simplicity and their ability to generate transform-limited pulses in the picosecond regimes. A drawback of the conventional passively mode-locked fiber lasers is that the pulse repetition rate is relatively low, at best a few tens of MHz, because of long cavity length. In order to raise repetition rate up to a few GHz, the cavity length has to be shortened below a few centimeters. Fiber lasers with such a short cavity require a high gain fiber and a small saturable absorber with low loss. Recently, the authors have proposed and demonstrated a small and low-loss saturable absorber device incorporating carbon nanotubes (CNT). Using CNT, we have realized very stable 2cm-long, 5GHz mode-locked Er:Yb-codoped silica-fiber laser, but the output power was limited to ∼0.2mW due to insufficient gain in the Er:Yb-codoped silica-fiber. Here we used heavily Er:Yb-codoped phosphate fiber to form 1 cm-long cavity with fiber mirrors, and succeeded in generating stable pulse trains with output power as high as 30mW and repetition rate as high as 10GHz at 1535nm.
KW - Carbon nanotubes
KW - Passive mode-locking
KW - Phosphate fiber
KW - Saturable absorption
UR - http://www.scopus.com/inward/record.url?scp=34248357871&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34248357871&partnerID=8YFLogxK
U2 - 10.1117/12.700024
DO - 10.1117/12.700024
M3 - Conference contribution
AN - SCOPUS:34248357871
SN - 0819465666
SN - 9780819465665
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Fiber Lasers IV
T2 - Fiber Lasers IV: Technology, Systems, and Applications
Y2 - 22 January 2007 through 25 January 2007
ER -