Midinfrared holmium fiber lasers

The use of the high-power Tm/sup 3+/-doped silica fiber laser as a pump source for Ho/sup 3+/-doped silica and Ho/sup 3+/-doped fluoride fiber lasers for the generation of 2.1-/spl mu/m radiation is demonstrated. The Ho/sup 3+/-doped silica fiber laser produced a maximum output power of 1.5 W at a slope efficiency of /spl sim/82%; one of the highest slope efficiencies measured for a fiber laser. In a nonoptimized but similar fiber laser arrangement, a Ho/sup 3+/-doped fluoride fiber laser produced an output power of 0.38 W at 2.08 /spl mu/m at a slope efficiency of /spl sim/50%. A Raman fiber laser operating at 1160 nm was also used to pump a Ho/sup 3+/-doped fluoride fiber laser operating at a wavelength of 2.86 /spl mu/m. An output power of 0.31W was produced at a slope efficiency of 10%. The energy transfer upconversion process that depopulates the lower laser level in this case operates at a higher efficiency when the pump wavelength is closer to the absorption peak of the /sup 5/I/sub 6/ energy level, however, this energy transfer process does not impede to a great extent the performance of the Ho/sup 3+/-doped fluoride fiber laser based on the /spl sim/2.1/spl mu/m laser transition.

[1]  Stuart Jackson,et al.  Grating-free nth order cascaded Raman fibre lasers using highly Ge-doped low loss fibre. , 2004, Optics express.

[2]  L. Wetenkamp,et al.  Efficient CW operation of a 2.9 mu m Ho/sup 3+/-doped fluorozirconate fibre laser pumped at 640 nm , 1990 .

[3]  Y. Miyajima,et al.  1.9 mu m Tm-doped silica fibre laser pumped at 1.57 mu m , 1994 .

[4]  David G. Lancaster,et al.  85 W Tm3+-doped silica fibre laser , 2005 .

[5]  George W. Turner,et al.  Ho:YAG laser pumped by 1.9-/spl mu/m diode lasers , 1995 .

[6]  D. K. Paul,et al.  Distributed channel model for HEMT signal and noise parameters , 1992 .

[7]  Javier Gozalvez,et al.  Channel allocation mechanisms for improving QoS in packet mobile radio networks , 2005 .

[8]  T. Komukai,et al.  1.9 mu m Tm-doped fluoride fibre amplifier and laser pumped at 1.58 mu m , 1993 .

[9]  S. Jackson.  Singly Ho3+-doped fluoride fibre laser operating at 2.92 [micro sign]m , 2004 .

[10]  Y. Messaddeq,et al.  Dynamics of Tm–Ho energy transfer and deactivation of the 3F4 low level of thulium in fluorozirconate glasses , 2004 .

[11]  W. Loh,et al.  Suppression of self-pulsing behavior in erbium-doped fiber lasers with resonant pumping. , 1996, Optics letters.

[12]  B. Srinivasan,et al.  High-power "Watt-level" CW operation of diode-pumped 2.7 aem fiber lasers using efficient cross-relaxation and energy transfer mechanisms. , 1999, Optics express.

[13]  Stuart D. Jackson,et al.  High-power diode-cladding-pumped Tm3+, Ho3+-doped silica fibre laser , 2003 .

[14]  Hisayoshi Toratani,et al.  Spectroscopic properties and energy transfers in Tm3+ singly- and Tm3+Ho3+ doubly-doped glasses , 1996 .

[15]  David N. Payne,et al.  Ytterbium-doped large-core fibre laser with 1 kW of continuous-wave output power , 2004 .

[16]  Norman P. Barnes,et al.  Ho:Ho upconversion: applications to Ho lasers , 2003 .

[17]  Terence A. King,et al.  High-efficiency CW operation of 890 nm pumped holmium fluoride fibre laser , 1992 .

[18]  J. Limpert,et al.  100-W single-frequency master-oscillator fiber power amplifier. , 2003, Optics letters.

[19]  Udo Unrau,et al.  Room temperature CW fibre laser at 3.22 µm , 1998 .

[20]  E. Chicklis,et al.  High-power/high-brightness diode-pumped 1.9-/spl mu/m thulium and resonantly pumped 2.1-/spl mu/m holmium lasers , 2000, IEEE Journal of Selected Topics in Quantum Electronics.

[21]  Stuart D. Jackson,et al.  High-power broadly tunable Ho3+-doped silica fibre laser , 2004 .

[22]  S. Jackson,et al.  Single-transverse-mode 2.5-W holmium-doped fluoride fiber laser operating at 2.86 microm. , 2004, Optics letters.

[23]  T. Sumiyoshi,et al.  Dual-wavelength continuous-wave cascade oscillation at 3 and 2 mum with a holmium-doped fluoride-glass fiber laser. , 1998, Optics letters.

[24]  Shaw,et al.  Measurement of up-conversion energy-transfer probabilities in Ho:Y3Al5O12 and Tm:Y3Al5O12. , 1994, Physical review. B, Condensed matter.

[25]  Anne C. Tropper,et al.  Continuous-wave oscillation of holmium-doped silica fibre laser , 1989 .

[26]  T. King,et al.  Pump induced thermal effects in high power Tm3+ and Tm3+/Ho3+ cladding-pumped fibre lasers , 2003 .

[27]  C. Millar,et al.  Lasing at 2.08 mu m and 1.38 mu m in a holmium doped fluoro-zirconate fibre laser , 1988 .

[28]  J. Schneider,et al.  Fluoride fibre laser operating at 3.9 /spl mu/m , 1995 .

[29]  Stuart D. Jackson,et al.  2.7-W Ho3+-doped silica fibre laser pumped at 1100 nm and operating at 2.1 μm , 2003 .

[30]  M. Wrage,et al.  Diode-pumped 1-W Er-doped fluoride glass M-profile fiber laser emitting at 2.8 mum. , 1999, Optics letters.

[31]  E. M. Dianov,et al.  Efficient silica-based Ho3+ fibre laser for 2 µm spectral region pumped at 1.15 µm , 2000 .

[32]  J Schneider,et al.  Characterization of a Ho(3+)-doped fluoride fiber laser with a 3.9-mum emission wavelength. , 1997, Applied optics.

[33]  J. Limpert,et al.  Ultrashort Pulse Fiber Lasers and Amplifiers , 2004 .

[34]  M. Ibsen,et al.  83-W single-frequency narrow-linewidth MOPA using large-core erbium-ytterbium Co-doped fiber , 2004, IEEE Photonics Technology Letters.

[35]  Stuart D. Jackson,et al.  Cross relaxation and energy transfer upconversion processes relevant to the functioning of 2 μm Tm3+-doped silica fibre lasers , 2004 .

[36]  M. Pollnau,et al.  Diode-pumped 1.7-W erbium 3-/spl mu/m fiber laser , 1999, Technical Digest. CLEO/Pacific Rim '99. Pacific Rim Conference on Lasers and Electro-Optics (Cat. No.99TH8464).

[37]  W. A. Clarkson,et al.  Efficient Ho : YAG laser pumped by a cladding-pumped tunable Tm : silica-fibre laser , 2004 .

[38]  Y. Jeong,et al.  Ytterbium-doped large-core fiber laser with 1.36 kW continuous-wave output power. , 2004, Optics express.

[39]  Masataka Nakazawa,et al.  Efficient Er3+‐doped optical fiber amplifier pumped by a 1.48 μm InGaAsP laser diode , 1989 .

[40]  David J. Richardson,et al.  A 103 W erbium-ytterbium co-doped large-core fiber laser , 2003 .