The study is carried out in absence and presence of possible transverse and angular misalignments.
Laser diode microlens.
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We present a theoretical investigation of coupling optics involving a laser diode and circular core graded index single mode fiber via a parabolic microlens on the fiber tip to predict the nature of suitable refractive index profile for the first time in connection with optimum coupling.
Article osti 6431717 title microlens frames for laser diode arrays author skidmore j a and freitas b l abstractnote monolithic microlens frames enable the fabrication of monolithic laser diode arrays and are manufactured inexpensively with high registration and with inherent focal length compensation for any lens diameter variation.
The ability to condition the radiance of laser diodes using shaped fiber cylindrical microlens technology has dramatically increased the number of applications that can be practically engaged by diode laser arrays.
Direct diode to fiber coupling has recently been demonstrated for a medical application in which 22 w of cw 690 nm radiation was delivered from a microlens conditioned stack of algainp laser diode bars through a 1 mm core fused silica fiber.
A laser diode with an integrated microlens acts as virtual point source vps and the beam behaves like it was emitted from the virtual point source with divergence angle q.
The details of which have been shown in table 1 among the commonly used single mode fiber including circular core and elliptic core the former is more widely used.
Fibers with different kinds of core and index as well as different kinds of microlens on the fiber tip were comprehensively investigated to improve the coupling efficiency between the laser diode and the microlens fiber.
Different kinds of microlenses are fabricated on fiber tips in order to maximise laser to fiber coupling.
Lawrence livermore national laboratory llnl has actively pursued optical efficiency and engineering improvements in this technology in an effort to supply large radiance.
Simple conical microlenses are fabricated on the end of a vapor axial deposition single mode fiber to increase the coupling efficiency between the laser diode and the single mode fiber.
The lowest coupling loss 3 db has been achieved by using a 1 3 μm ingaasp buried heterostructure laser diode and a single mode fiber.
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Powerphotonic s microlens arrays are the ideal lens solution providing a precise and monolithic component for array collimation and coupling.
All the aberrations are corrected and the beam has circular beam profile.
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Multi channel optical communication systems require microlens arrays for coupling between laser sources fiber and waveguide arrays optical multiplexing and optical switching.
