The present disclosure relates to an optical waveguide system. The system has a first waveguide having a core-guide and a cladding material portion surrounding and encasing the core-guide to form a substantially D-shaped cross sectional profile with an exposed flat section running along a length thereof. The core-guide enables a core-guide mode for an optical pulse signal having a first characteristic, travelling through the core-guide. A material layer of non-linear material is used which forms a second waveguide. The material layer is disposed on the exposed flat section of the cladding material portion. The material layer forms a plasmonic device to achieve a desired coupling with the core-guide to couple optical energy travelling through the core-guide into the material layer to modify the optical energy travelling through the core-guide such that the optical energy travelling through the core-guide has a second characteristic different from the first characteristic.

An optical coupler includes N members. A Kth (K is an integer of 1 to N) member includes a MCF including P (P is an integer of N or greater) cores, and a marker disposed at a position closest to a first core, and at least one SCF. A core of the SCF of the Kth member is coupled to a coupled core other than the first core. Cores of the MCF of an Mth (M is an integer of 1 to N−1) member are connected to cores of the MCF of an (M+1)th member. A total number of SCF included in the N members is P. Each of P cores of the MCFs configured through the connection of the N members is connected to a core of one of the SCFs.

A fiber support assembly includes: a first glass tube, wherein the first glass tube is at tached to a microlens or lenslet of a microlens or lenslet array; a second glass tube at least partially disposed within the first glass tube; and a gain fiber disposed within the second glass tube, wherein the gain fiber has a first tapered end cap, and wherein the gain fiber with the first tapered end cap is aligned to the microlens or lenslet attached to the first glass tube. The fiber support assembly may further include: a pump fiber disposed within the second glass tube, wherein the pump fiber has a second tapered end cap; and a reflector configured to receive counter-pumping light from the pump fiber and direct the counter-pumping light to the first tapered end cap of the gain fiber.

A structural coupling for use within a laser system. In a preferred embodiment, a laser system for cleaning purposes would be displaced within a facility having dangerous conditions which could potentially damage the components of the laser, such as within a nuclear power facility. Protecting the laser components typically requires shielding which can fail, resulting in potential contamination of laser generator and components. The structural coupling would allow the laser to pass through a structural element to be used on the interior of the facility such that the end effector may be freely used within the facility while the mobile laser unit itself is safely stored outside of the dangerous area. The coupling allows the laser to pass through the structural element or opening to the end effector without exposing the laser itself to potential contamination

An apparatus includes an all-fiber side-pump combiner fabrication system and a control unit coupled to control operations of the all-fiber side-pump combiner fabrication system to produce a (N+1)×1 combiner with N side pump fibers.

There is described a method of optically coupling a first optical fiber and a second optical fiber to one another. The method generally has a step of bringing a free end of the first optical fiber, the second optical fiber and liquid in close proximity to one another within a coupling region, the free end of the first optical fiber having a dimension below a critical dimension, the free end of the first optical fiber moving within said liquid to contact the second optical fiber along a given coupling length, said contact optically coupling the free end of the first optical fiber and the second optical fiber to one another.

An active waveguide including active and passive rods which have respective polymeric claddings mechanically and optically coupled to one another so as to define a side pumping scheme. One or a plurality of elements are embedded in one of or both active and passive rods and have a refractive index lower than the lowest of refractive indices of the respective active and passive rods at least 1*10.sup.−3. The MM core of the active rod includes inner and outer concentric regions with a concentration of light emitters in the outer region being lower than that of the inner region at more than 50% and, a radius of the inner region being at most 92% of that of the outer region. The unabsorbed pump light at the output of the active waveguide constitutes less than 1% of the delivered pump light which in combination with the refractive index of the embedded elements and selectively doped core regions contribute to laser efficiency of at least 86%.

In an example amplifier system, an input pulse train is passed through an optical stage that splits each pulse into two or more pulses. These divided pulses are then injected into at least two amplifiers for amplification. The amplified pulses are subsequently passed back through the same optical stage in order to combine the pulses back into one high energy pulse. The amplifier system can use time division multiplexing (TDM) and/or spatial division multiplexing (SDM) to produce, e.g., four pulses in conjunction with two amplifiers and propagation through two optical beam splitters, which are coherently combined into a single output pulse after amplification. The amplifiers can comprise fiber amplifiers or bulk amplifiers.

The present disclosure relates to an optical waveguide system. The system has a first waveguide having a core-guide and a cladding material portion surrounding and encasing the core-guide to form a substantially D-shaped cross sectional profile with an exposed flat section running along a length thereof. The core-guide enables a core-guide mode for an optical pulse signal having a first characteristic, travelling through the core-guide. A material layer of non-linear material is used which forms a second waveguide. The material layer is disposed on the exposed flat section of the cladding material portion. The material layer forms a plasmonic device to achieve a desired coupling with the core-guide to couple optical energy travelling through the core-guide into the material layer to modify the optical energy travelling through the core-guide such that the optical energy travelling through the core-guide has a second characteristic different from the first characteristic.

The present disclosure relates to an optical waveguide system. The system may include a first waveguide having a core-guide and a material portion surrounding and encasing the core-guide. The core-guide enables a core-guide mode for an optical signal travelling through the core-guide. A second waveguide forms a lossy waveguide on an outer surface of the first waveguide. The construction of the second waveguide is such as to achieve a desired coupling between the core-guide mode and the lossy waveguide to control an energy level of the optical signal travelling through the core-guide.