摘要:
La présente invention concerne une source laser (1) pulsée à solide, comprenant un premier résonateur (R1) formé par un premier miroir réfléchissant (2) et un miroir de sortie (3) partiellement réfléchissant,et un module laser (4) placé entre les miroirs (2, 3) du premier résonateur (R1). Le premier résonateur (R1) comprendun barreau laser en matériau solide à gain adapté pour générer un faisceau laser, etune source de pompage laser adaptée pour émettre dans le barreau laser un faisceau de pompe, dans lequel le barreau laser est adapté pour amplifier le faisceau de pompe pour générer le faisceau laser, et le miroir desortie(3) est adapté pour transmettre partiellement le faisceau laser. La source laser (1) comprend en outre un dispositif d'atténuationvariable (QS) pouvant basculer entre un état opaque et un état transparent pour le faisceau laser pour permettre à la source laser (1) de fonctionner en un mode déclenché, le dispositif (QS) étant placé entre le module laser (4) et le miroir réfléchissant(2), un élément polarisant linéairement disposé entre le dispositif d'atténuation variable (QS) et le module laser (4), etun élément retardateur de phase (8) disposé entre le miroir de sortie (3) et le module laser (4).
摘要:
A self-seeding high power laser includes a spatial filter; an optical relay for circulating a low power un-distorted optical beam, an adaptive optic optically coupled to the output of the optical relay; a high power amplifier optically coupled to an output of the adaptive optic phase control element, wherein adaptively modified phasefront injected by the adaptive optic cancels distortions produced by the high power amplifier; a beamsplitter optically coupled to the high power amplifier for splitting the high power un-distorted optical beam into a high power output beam as the output of the self-seeding high power laser, and a low power beam; a focusing lens; a detector for detecting a metric of the low power beam; and a controller for adaptively controlling the adaptive optic to maximize the power of the high power amplifier, based on the detected metric.
摘要:
A surgical laser system includes a pump module configured to produce pump energy within an operating wavelength, a gain medium configured to convert the pump energy into first laser energy, a non-linear crystal (NLC) configured to convert a portion of the first laser energy into second laser energy, which is a harmonic of the first laser energy, an output, and a first path diversion assembly having first and second operating modes. When the first path diversion assembly is in the first operating mode, the first laser energy is directed along the output path to the output, and the second laser energy is diverted from the output path and the output. When the first path diversion assembly is in the second operating mode, the second laser energy is directed along the output path to the output, and the first laser energy is diverted from the output path and the output.
摘要:
The present disclosure relates to the design of fiber frequency comb lasers with low carrier phase noise. Examples of these low carrier phase noise oscillators can be constructed from both soliton and dispersion compensated fiber lasers via the use of intra-cavity amplitude modulators such as graphene modulators. In low carrier phase noise dispersion compensated fiber frequency comb lasers, graphene and/or bulk modulators can further be used, for example, for phase locking of one comb line to an external continuous wave (cw) reference laser via high bandwidth control of the repetition rate of the comb laser via the graphene modulator. As a result a low phase noise radio frequency (RF) signal can be generated. In some implementations, a frequency comb exhibiting phase noise suppression of at least about 10 dB over a frequency range up to about 100 kHz is provided.
摘要:
A wavelength tunable silicon-on-insulator (SOI) laser comprising: a laser cavity including: a semiconductor gain medium having a front end and a back end, wherein a mirror of the laser cavity is located at the back end of the semiconductor gain medium; and a phase-tunable waveguide platform coupled to the front end of the semiconductor gain medium, the phase- tunable waveguide platform comprising: a first resonator and a second resonator; at least one resonator being a phase-tunable resonator; wherein the first resonator is any one of: an MMI device including a pair of reflective surfaces defining a resonator cavity therebetween such that the device is configured to act as a Fabry-Perot filter; a ring resonator; or a waveguide Fabry-Perot filter; and wherein the second resonator is any one of: an MMI device including a pair of reflective surfaces defining a resonator cavity therebetween such that the device is configured to act as a Fabry-Perot filter; a ring resonator; or a waveguide Fabry-Perot filter.
摘要:
A surface emitting laser is provided which requires a smaller number of components, and which can reduce the cost. A surface emitting laser includes a cavity constituted by a first reflecting mirror (101) and a second reflecting mirror (102), and having a resonant wavelength that is changed by changing a cavity length with movement (106) of the first reflecting mirror (101) in a direction facing the second reflecting mirror. The surface emitting laser further includes an active layer (105) arranged in the cavity and emitting light, a third reflecting mirror (103) arranged on the opposite side of the active layer (105) with respect to the second reflecting mirror (102), and a light receiving element (104) arranged to receive light passing through the third reflecting mirror. The wavelength sweeping VCSEL may comprise a first DBR (101) on a deformable support (303) which is in turn supported by a further support (302). The active layer (105) may be a MQW on a second DBR (102) on a substrate (107) having a hole for back-side emission for the radiation to be detected by a photodiode (104). The detected radiation is frequency filtered by a Fabry-Perot resulting from the second DBR (102) and a low reflectivity third reflector (103) realized by the interface between the uncoated lower surface of a quartz substrate (103) and air. Anti-reflective coatings (301,306) on the other outer surfaces prevent undesired further Fabry-Perot resonators. Choosing the FSR of this Fabry-Perot correspondingly, a clock signal for OCT applications can be derived from the Fabry-Perot filtered and detected back-side emission of the VCSEL.
摘要:
There is provided an intracavity module (150) arranged to be replaceably-mounted inside a laser resonator cavity. The intracavity module comprises a first optical element (104), a second optical element (102) and a frequency conversion element (107). The frequency conversions element is arranged to receive light at a first frequency and output light at a second frequency. The first optical element is at least partially transmissive at the first frequency. The frequency conversion element is encapsulated by at least the first optical element and the second optical element. The laser resonator may comprise a HR end mirror (101), a Q-switch (108), a Nd:YAG laser gain medium (105), a mirror (103) being transmissive at the laser fundamental and reflective at its second-harmonic, a second-harmonic generating non-linear crystal (106), the first optical element (104) being a mirror reflective at the third-harmonic and transmissive at the fundamental and the SH, a non-linear crystal (107) for generating the third-harmonic and a mirror (102) reflecting laser fundamental and SH and transmitting the third-harmonic. The module (150) may be translated to provide a non-damage part of the facet of the third-harmonic generating crystal (107) or replaced in case this non-linear-crystal can not be used any more to extend the lifetime of the laser.
摘要:
According to embodiments of the present invention, an optical light source is provided. The optical light source includes at least two reflectors arranged spaced apart from each other, the at least two reflectors defining an optical cavity therebetween, wherein at least one reflector of the at least two reflectors includes an optical tuning element, and an optical gain medium positioned in the optical cavity and in an optical path between the at least two reflectors, wherein the optical tuning element is configured to allow tuning of light propagating in the optical cavity between the at least two reflectors and the optical gain medium in response to an applied voltage to the optical tuning element. According to further embodiments of the present invention, an optical transmitter is also provided.