Tampere University of Technology Prof. Oleg G. Okhotnikov 11.6.2009 - PowerPoint PPT Presentation

1 Optoelectronics Research Centre at Tampere University of Technology Prof. Oleg G. Okhotnikov 11.6.2009

2 ORC – A cradle of photonics in Finland ORC has two divisions (i) Semiconductor physics & technology (ii) Ultra-fast & intense laser optics + Commercialization of research results 65 employees (December 2008) Investments in scientific equipment: > € 18 million Total funding = € 25M during 2000-2008 € 5.0 million (2008) 23 research projects in 2008, revenue Co-operation with 40 international and 20 national partners 11.6.2009

3 Laser manufacturing industry has spun out from academic research From Research to Business: Spin-off companies 2008 1991 2000 2003 2004 11.6.2009

4 Laser manufacturing industry has spun out from academic research Coherent Finland Modulight Telecom/Industrial Non-telecom diode lasers diode lasers Corelase Fibre lasers Building a factory in 2008-2009 11.6.2009

5 Recent EU FP6 (STREP) Projects NATAL : Materials, equipment and processes for production of nano-photonic and nano- electronic devices. For development of OP-SDLs operating at 630 – 670 nm, 940 nm, 1040 nm and 1220 nm; development of frequency-doubled OP-SDLs emitting at 335 nm, 470 nm, 520 nm, and 615 nm (RGB light sources) URANUS : Ultra-fast technology for multicolor compact high-power fibre systems. For development of high power ultra-fast fibre lasers and SESAMs and PCFs; development of super-continuum fibre lasers 11.6.2009

6 New EU FP7 & National Projects Fast-Dot (www.fast-dot.eu) : Compact Ultrafast Laser Sources Based On Novel Quantum Dot Structures Lamp (TEKES) : Cost-effective Fiber Lasers for Material Processing WIT (Academy) : Nonlinear Optics of Photonic Nanowires and Microstructured Nanotapers 11.6.2009

7 EU FP6 NATAL An example: GaInNAs 615 nm OP-VECSEL with 2.7 W output (world record) Gain mirror Gain mirror Heat spreader Heat spreader Copper mount Copper mount Pump: 808 nm Pump: 808 nm Glass etalon, 25- μ m Glass etalon, 25- μ m M2 M2 M2 M2 M1 M1 RoC 2 =200 mm RoC 2 =200 mm RoC 1 =150 mm RoC 1 =150 mm BBO, 4-mm BBO, 4-mm M3 M3 M3 M3 RoC 3 =100 mm RoC 3 =100 mm ORC (coordinator), Technical Univ. of Berlin, CTH (Sweden), IoP (Strathclyde), OSRAM EU FP6 (Germany), TOPTICA (Germany), OPTOCAP (UK), EpiCrystals (Finland) July 2005 – June 2008 11.6.2009 11/06/2009

8 EU FP6 NATAL - summary Fundamental, cw Gain region 940 nm – 3 W Pump 1050 nm – 5 W 1220 nm – > 3 W (GaInNAs) 2030 nm – > 1 W (GaSb) Mode-locked by SESAMs 2 GHz, ps, 100 mW Heat sink Frequency doubled, cw Heat spreader: diamond, SiC 615 nm, 2.7 W 470 nm, 700 mW 11.6.2009

9 EU FP6 URANUS FIANIUM’s high power MOPA ORC (coordinator, Finland), INESC Porto, FIANIUM (UK), NKT (Denmark), STRATOPHASE (UK), CORELASE (FINLAND) 11.6.2009

10 EU FP6 URANUS (continued…) Fianium’s SC laser CORELASE ps fiber laser 11.6.2009

11 EU FP6 URANUS: Ultra-fast optical pulses from fibre lasers using a SESAM as a cavity end-mirrors Ultra-short-pulse train (SESAM inside). An example of using SESAM in a glass fibre laser 1.55 m, P out 0.5 W (average) peak power 100 kW Pump laser Output 980 nm t < 500 fs SESAM Loop mirror Er- doped fibre laser Simplified diagram 10 Autocorrelation intensity, normalized 8 89 fs 6 4 2 0 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 Time delay, ps Fiber laser record in 2007 11.6.2009

12 EU FP6 URANUS: Photonic crystal (PC) fibre laser: 8 W supercontinuum spectrum Laser source & amplifier + a PC fibre with zero dispersion at 1 m Fibre laser (ORC / Fianium Ltd., UK) Photonic crystal fibre Supercontinuum output Supercontinuum PC fibre laser Light is effectively confined in the core Width of the spectral range of 1 m of a PC fibre Cooperation between ORC and NKT (Denmark) within EU FP6 URANUS , 2006 11.6.2009

13 EU FP6 URANUS: Tapered fibre laser: Concentration on visible light 20 cm white light 0.9 μ m waist diameter of a tapered fibre 80mW 65mW Intensity, 10dB/div. 50mW 35mW 15mW 3mW 350 400 450 500 550 600 650 (Cover page of Optics Express , Oct. 2005) Wavelength, nm EU FP6 URANUS , 2006 Spectral width 200 nm, total power 40 mW , concentrated on the visible range 11.6.2009

14 (a) New materials for photonics (b) at ORC Semiconductor Quantum Dots Carbone Nanotubes Photonic crystal nanowire fibers 11.6.2009

15 (a) (a) Single-walled Carbon Nanotube (b) (b) films for ultrafast ultrabroadband technology 1,0 Normalized amplitude Intensity, 10dB/div. 0,8 0,6 0,4 0,2 0,0 1030 1040 1050 1060 1070 -4 -2 0 2 4 Wavelength, nm Time, ps 1,0 1,0 Normalized amplitude Normalized amplitude 0,8 0,8 0,6 0,6 0,4 Intensity, 5 dB/div. 0,4 Intensity, 10 dB/div. 0,2 0,2 0,0 0,0 -4 -2 0 2 4 Time, ps -3 -2 -1 0 1 2 3 Time, ps 1960 1970 1980 1990 2000 2010 2020 2030 1540 1550 1560 1570 1580 1590 1600 1610 Wavelength, nm Wavelength, nm Oma nimi ja esityksen aihe vaihdettava mastersivulla 11.6.2009

16 600 W Power Scalable Single Mode Tapered Double Clad Fiber Laser 600 NA 0.15, slope 63% NA 0.18, slope 51% 500 Output power, W 400 300 200 100 0 0 200 400 600 800 1000 1200 Launched pump power (915nm), W Now over 750 W! 11.6.2009

17 FAST-DOT EU Project 500 OC=0.2% OC=0.4% 400 Output power (mW) 300 200 100 0 0 1 2 3 4 5 6 7 8 9 10 Input pump power (W) Typical beam profile of the laser. (OC=0.4 %, Output characteristics. The curved mirror is used as an output P out =364 mW). coupler with different transmissions. In vertical direction the M 2 was below 1.1 and in With 1 % transmission the laser did not start lasing. horizontal direction it was ~1.2. 11.6.2009

18 THANK YOU! Contact to: Oleg Okhotnikov, oleg.okhotnikov@tut.fi +358 3 3115 3005 www.orc.tut.fi 11.6.2009