High Power Diode Lasers - Center for Biomedical Optics and New ...

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In the perpendicular direction : quasi-gaussian far-field profile (M² close to 1) <strong>for</strong> all the lasers fabricated with the same epitaxy. 1,0 I (u.a.) 0,5 0,0 -60 -30 0 30 60 Angle (°) θ 1/e² ≈ 52-65° But in the parallel direction, it depends on the waveguide shape …
In the parallel direction : 2 main kinds of lasers The broad-area laser : high power (∼10W at 0.98µm) but low beam spatial quality 100 µm 1.0 2 mm Far field P = 1 W M² = 15-20 I (u.a.) 0.8 0.6 0.4 0.2 0.0 -15 -10 -5 0 5 10 15 Angle (°) 8,7° 9,8° in the // direction The ridge laser: high spatial beam quality but a few hundreds of mW 5 µm 2 mm P =300 mW M² = 1.2 I (u.a.) 1.0 0.8 0.6 0.4 0.2 0.0 -15 -10 -5 0 5 10 15 Angle (°) 8° 14° Far field in the // direction
Page 1 and 2: Bio-Photonics ’03 Summer School H
Page 3 and 4: How is a laser diode Max. size : 3
Page 5 and 6: Which material system for which wav
Page 7 and 8: substrate Schematic of the growth o
Page 9 and 10: Layers growth : 2 kinds of epitaxy
Page 11 and 12: Process Three steps of the planar p
Page 13 and 14: And electrical wires soldering …
Page 15 and 16: The laser diode : assymetric device
Page 17 and 18: • power measurement : high diverg
Page 19 and 20: • far-field measurement Laser dio
Page 21 and 22: W(z) = W W(z) 0 ⎛ 1+ ⎜ ⎜ ⎝
Page 23 and 24: • Catastrophic optical mirror dam
Page 25 and 26: Fabrication •Materials • Epitax
Page 27 and 28: Fabrication •Materials • Epitax
Page 29 and 30: Why a high brightness laser diode a
Page 31: 12 11 10 CW optical power records d
Page 35 and 36: The broad-area laser 100 µm large
Page 37 and 38: The ridge laser 5 µm large * 2mm l
Page 39 and 40: Others solutions to improve the bri
Page 43 and 44: Semiconductor amplifier and refract
Page 47 and 48: Between the broad-area laser and th
Page 49 and 50: Index guided tapered lasers bar Min
Page 51 and 52: • Tapered laser bars coupled in a
Page 53 and 54: Beam shaping technique General prin
Page 55 and 56: Beam shaping technique Schematic op
Page 57 and 58: ars at 808-980 nm On the laser diod
Page 59 and 60: Results with broad-area lasers - FB
Page 61 and 62: Results with tapered lasers - FBH 6
Page 63 and 64: CeramOptec GmbH Medical application
Page 65 and 66: CeramOptec GmbH Application Test of
Page 67 and 68: CeramOptec GmbH Application Test of
Page 69 and 70: Application Test of 975 nm system C

High Power Diode Lasers - Center for Biomedical Optics and New ...

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