This page contains a Flash digital edition of a book.
news digest ♦ Lasers operation mode.


Like all Oclaro high power laser products, the front facet of these laser diodes is protected against Catastrophic Optical Damage (COD) by the Oclaro E2 mirror passivation process. This enables higher power densities on each laser diode, which allows power scaling of diodes.


By owning the laser diode development from initial design and wafer form to final product, Oclaro can deliver designs that reach the power, brightness and reliability required at leading cost structures.


Oclaro’s portfolio of laser diodes include low- fill-factor bars from 50W to 80W and high-fill- factor conduction cooled bars at 120W and active cooled bars up to 200W. These products, all of which feature the a wavelength range from 910nm to 1070nm, allow for wavelength multiplexing with 5 to 6 colours (assuming 30nm spacing).


3S Photonics transforms into 3SPGroup


Following the successful synergies between 3S Photonics, Avensys and Manlight, the Group is uniting these three companies as a single entity


The name change to 3SP aims to simplify the Group’s image and to pursue its internal and external growth strategy.


The year 2011 was marked by significant events for the Group. It announced a growth in turnover of 64% and the change of ownership with the arrival of Eurazeo a listed investment company in Europe, who became the majority shareholder of the Group in October 2011. More recently, was the acquisition of Manlight, a globally recognised player for optical fibre amplifiers and lasers.


In 2012, 3SPGroup will continue its acquisition strategy in order to strengthen its position in


144 www.compoundsemiconductor.net January / February 2012


its historical markets, and to pursue vertical and market growth. To this end, the Group has decided to reorganise itself and simplify its image and name under one single brand.


“Beyond this marketing strategy, with the industrial and trade integration of our different structures, we wanted to offer a diversified and easily accessible range of products and solutions,” says Alexandre Krivine, President and CEO of 3SPGroup. “Our customers will continue to benefit from the increase of our production capacities and technical expertise.”


Cooling semiconductors with laser light


When laser light impacts a gallium arsenide nanomembrane, some of the light is reflected and the light is reflected back again via a mirror. The light flies back and forth in this space and forms an optical resonator.


Researchers at the Niels Bohr Institute have combined two worlds – quantum physics and nano physics, and this has led to the discovery of a new method for laser cooling semiconductor membranes.


The efficient cooling of semiconductor components is important for future quantum computers and ultrasensitive sensors. The new cooling method works quite paradoxically by heating the material! Using lasers, researchers cooled membrane fluctuations to minus 269 degrees C.


“In experiments, we have succeeded in achieving a new and efficient cooling of a solid material by using lasers. We have produced a semiconductor membrane with a thickness of 160 nanometres and an unprecedented surface area of 1 by 1 millimetre. In the experiments, we let the membrane interact with the laser light in such a way that its mechanical movements affected the light that hit it. We carefully examined the physics and discovered


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103  |  Page 104  |  Page 105  |  Page 106  |  Page 107  |  Page 108  |  Page 109  |  Page 110  |  Page 111  |  Page 112  |  Page 113  |  Page 114  |  Page 115  |  Page 116  |  Page 117  |  Page 118  |  Page 119  |  Page 120  |  Page 121  |  Page 122  |  Page 123  |  Page 124  |  Page 125  |  Page 126  |  Page 127  |  Page 128  |  Page 129  |  Page 130  |  Page 131  |  Page 132  |  Page 133  |  Page 134  |  Page 135  |  Page 136  |  Page 137  |  Page 138  |  Page 139  |  Page 140  |  Page 141  |  Page 142  |  Page 143  |  Page 144  |  Page 145  |  Page 146  |  Page 147  |  Page 148  |  Page 149  |  Page 150  |  Page 151  |  Page 152  |  Page 153  |  Page 154  |  Page 155  |  Page 156  |  Page 157  |  Page 158  |  Page 159  |  Page 160  |  Page 161  |  Page 162  |  Page 163  |  Page 164  |  Page 165  |  Page 166  |  Page 167  |  Page 168  |  Page 169  |  Page 170  |  Page 171  |  Page 172  |  Page 173  |  Page 174  |  Page 175  |  Page 176  |  Page 177  |  Page 178  |  Page 179  |  Page 180  |  Page 181  |  Page 182  |  Page 183  |  Page 184  |  Page 185  |  Page 186  |  Page 187  |  Page 188  |  Page 189  |  Page 190  |  Page 191  |  Page 192  |  Page 193  |  Page 194  |  Page 195  |  Page 196  |  Page 197  |  Page 198  |  Page 199  |  Page 200  |  Page 201  |  Page 202  |  Page 203  |  Page 204  |  Page 205  |  Page 206  |  Page 207  |  Page 208  |  Page 209  |  Page 210  |  Page 211  |  Page 212  |  Page 213  |  Page 214  |  Page 215  |  Page 216  |  Page 217  |  Page 218  |  Page 219  |  Page 220  |  Page 221  |  Page 222  |  Page 223  |  Page 224  |  Page 225  |  Page 226  |  Page 227  |  Page 228  |  Page 229  |  Page 230  |  Page 231  |  Page 232  |  Page 233  |  Page 234  |  Page 235  |  Page 236  |  Page 237  |  Page 238  |  Page 239  |  Page 240  |  Page 241