摘要:
In a single mode optical waveguide having a substrate (1), a cladding layer (3) formed on the substrate (1), a core portion (2) embedded in the cladding layer (3), and an elongated member (4a, 4b; 14; 14a, 14b) for applying a stress to the core portion (2) or a stress relief groove (5a, 5b; 64) for relieving a stress from the core portion (2) in the cladding layer (3) along the core portion (2). A position, shape and material of the elongated member (4a, 4b; 14; 14a, 14b) or the groove (5a, 5b; 64) are determined in such a way that stress-induced birefringence produced in the core portion (2) in accordance with a difference in thermal expansion coefficient between the substrate (1) and the single mode optical waveguide is a desired value.
摘要:
L'invention concerne un polariseur par absorption différentielle réalisé en optique intégrée Ce polariseur comporte, sur une couche guide d'onde (2) réalisé sur un substrat (1), une couche de matériau diélectrique (3) dont la surface (30) comporte des creux et des bosses et possède donc plusieurs zones inclinées (31). Les creux et les bosses délimitent des épaisseurs minimale (e m ) et maximale (e M ) de la couche (3) qui encadrent l'épaisseur de résonance du diélectrique pour le mode de polarisation (TM) à absorber. La couche (3) est de plus revêtue d'une couche métallique (4). L'invention concerne également un procédé permettant de réaliser un tel polariseur ainsi qu'un dispositif mettant en oeuvre ce procédé.
摘要:
The invention provides an optical sensor chip and an optical sensing system, wherein the optical sensor chip of the invention comprises a bottom cladding, a top cladding stacked on the bottom cladding and an optical waveguide core, the optical waveguide core is arranged between the top cladding and the bottom cladding, the top cladding is provided with an opened region for accommodating a sample to be tested, a part of the optical waveguide core is exposed through the opened region, the optical waveguide core comprises a first polarization rotator and a first polarization splitter, the first polarization splitter includes one input port and two output ports for outputting polarized light, the first polarization rotator is provided with a first end and a second end, the second end of the first polarization rotator is communicated with the input port of the first polarization splitter, and a dimension of the first polarization rotator gradually increases from the first end to the second end. The optical sensor chip of the invention can be designed in different sizes as required, does not need to be provided in a large volume, is convenient to use, does not need a tunable laser, and is low in cost.
摘要:
The present invention provides a polarizer and a polarization modulation system. The polarizer includes at least one MMI multi-mode waveguide, where one side of each MMI multi-mode waveguide is connected to an input waveguide, and the other side is connected to an output waveguide; an end portion of the side, on which the output waveguide is located, of the MMI multi-mode waveguide is provided with an adjustable portion, and the adjustable portion is connected to the output waveguide; and the polarizer further includes a controller connected to the adjustable portion, where the controller is configured to perform control to change a material property of the adjustable portion, so that the output waveguide outputs optical signals in different polarization states. The present invention implements adjustable polarization, and the structure is simple.
摘要:
A mode-matched waveguide Y-junction with balanced or unbalanced splitting comprises an input waveguide, expanding from an input end to an output end, for expanding the input beam of light along a longitudinal axis; first and second output waveguides extending from the output end of the input waveguide separated by a gap. Ideally, each of the first and second output waveguides includes an initial section capable of supporting a fundamental super mode, and having an inner wall substantially parallel to the longitudinal axis, and a mode splitting section extending from the initial section at an acute angle to the longitudinal axis.
摘要:
An optical coupling apparatus for coupling an optical fiber to a photonic chip is described. The apparatus includes a collimating microlens for collimating light from the optical fiber; a polarization splitting beam displacer for separating the light collimated by the collimating microlens into orthogonally polarized X and Y component beams; at least one focusing microlens for directing the X and Y component beams separately onto the photonic chip; and first and second surface grating couplers (SGCs) orthogonally disposed on the photonic chip and configured for operation in a same polarization state, for coupling the X and Y component beams, respectively, to the photonic chip.
摘要:
A polarization mode converter is provided and includes a rectangular waveguide (101), a first tapered waveguide (102), and a second tapered waveguide (103). A height of the rectangular waveguide (101) is a first height H1. A side of the first tapered waveguide (102) is connected to the rectangular waveguide (101). A width of the first tapered waveguide (102) changes gradually. A height of the first tapered waveguide (102) is a second height H2, and the second height H2 is less than the first height H1. The second tapered waveguide (103) is unconnected to the rectangular waveguide (101), and the second tapered waveguide (103) is unconnected to the first tapered waveguide (102). A width of the second tapered waveguide (103) changes gradually. A height of the second tapered waveguide (103) is the first height H1. A distance between a first end of the second tapered waveguide (103) and the rectangular waveguide (101) is a first distance, a distance between a second end of the second tapered waveguide (103) and the rectangular waveguide (101) is a second distance, and the second distance is greater than the first distance. The first tapered waveguide (102) is located between the rectangular waveguide (101) and the second tapered waveguide (103).
摘要:
The present disclosure concerns a photonic integrated circuit (10) and a method for interrogating a ring resonator (3) comprised therein. The circuit (10) comprises an optical port (4) for coupling light (L) into and out of the circuit (10). The circuit (10) further comprises a first waveguide (1) for receiving light (L1) from the optical port (4), and a second waveguide (2) for sending back light to the optical port (4). The ring resonator (3) is arranged between the first waveguide (1) and the second waveguide (2) for coupling a resonant wavelength (») of the light therein between. The optical port (4) comprises a polarization splitting coupler for coupling light of a first polarization (P1) to and from the first waveguide (1) and coupling light of a second polarization (P2), orthogonal to the first polarization (P1), to and from the second waveguide (2).
摘要:
A polarization mode converter is provided and includes a rectangular waveguide (101), a first tapered waveguide (102), and a second tapered waveguide (103). A height of the rectangular waveguide (101) is a first height H1. A side of the first tapered waveguide (102) is connected to the rectangular waveguide (101). A width of the first tapered waveguide (102) changes gradually. A height of the first tapered waveguide (102) is a second height H2, and the second height H2 is less than the first height H1. The second tapered waveguide (103) is unconnected to the rectangular waveguide (101), and the second tapered waveguide (103) is unconnected to the first tapered waveguide (102). A width of the second tapered waveguide (103) changes gradually. A height of the second tapered waveguide (103) is the first height H1. A distance between a first end of the second tapered waveguide (103) and the rectangular waveguide (101) is a first distance, a distance between a second end of the second tapered waveguide (103) and the rectangular waveguide (101) is a second distance, and the second distance is greater than the first distance. The first tapered waveguide (102) is located between the rectangular waveguide (101) and the second tapered waveguide (103).
摘要:
Methods and systems for grating couplers (117A-117H) incorporating perturbed waveguides are disclosed and may include in a semiconductor photonics die (130), communicating optical signals into and/or out of the die utilizing a grating coupler (117A-117H) on the die, where the grating coupler comprises perturbed waveguides. The perturbed waveguides may comprise a variable width along their length. The grating coupler may comprise a single polarization grating coupler comprising perturbed waveguides and a non-perturbed grating. The grating coupler may comprise a polarization splitting grating coupler (PSGC) (403)that includes two sets of perturbed waveguides at a non-zero angle, or a plurality of non-linear rows of discrete shapes. The PSGC may comprise discrete scatterers (805) at an intersection of the sets of perturbed waveguides. The grating couplers may be etched in a silicon layer on the semiconductor photonics die or deposited on the semiconductor photonics die. The grating coupler may comprise individual scatterers (805) between the perturbed waveguides.