Grin Lens Array, also known as a gradient variable refractive index lens, is a columnar optical lens whose refractive index distribution is gradual along the radial direction. The refractive index at the center of the self-focusing lens has the highest value and decreases along the radial direction, so that light can be self-focused when propagating in the lens, which is often used for optical transmission in multimode communication.
According to customer requirements, our company precisely arranges self-focusing lenses into two-dimensional arrays to form self-focusing lens arrays to meet the needs of efficient coupling between fiber arrays and laser diode arrays, fiber arrays and detector arrays, etc., and accepts customer customization. Compared with micro-lens arrays made by other methods, its short focal length, both sides are planar, compact coupling space and simple coupling operation make it a preferable solution for many applications.
Product parameter
|
Arrangement mode
|
4*4
|
Permutation period
|
0.5mm
|
|
Fiber diameter
|
125um
|
Optical fiber type
|
PM 1550 Fiber
|
|
Periodic deviation
|
±1um
|
Optical fiber position deviation
|
±1um
|
|
Cumulative error
|
0
|
Optical fiber numerical aperture
|
0.13
|
|
Applicable wavelength
|
1520~1620nm
|
Extinction ratio
|
＞20dB（@1550nm）
|
|
Return loss
|
≥50dB
|
Insertion loss
|
≤0.3dB
|
|
Alignment mode
|
Slow axis alignment
|
Alignment accuracy
|
±3°
|
|
Connecting head
|
FC/APC
|
length
|
1m
|
|
Microlens material
|
K-PG375
|
Microlens focal length
|
4.8mm
|
|
Microlens center thickness
|
1mm
|
Microlens aperture
|
0.48
|
