SILICAGRIN
Gradient Index Micro Lens
A new standard for medical fibers.
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A new standard for medical fibers.
For precise beam control, fiber catheter and probe tips are joined to SILICAGRIN.
Make your genuine selective medical device development complete with our outstanding optical properties.
What is “SILICAGRIN”?
With SILICAGRIN, you no longer need complicated lenses at the end of your optical fiber. SILICAGRIN is an extremely minute silica rod lens (grin lens) with a diameter of 125μm. SILICAGRIN is fusion-spliced onto the tip of an optical fiber to control the diameter, focus, and spread of the light beam as desired by the application engineer.
Grin lens is a common optical device that already exists, but Toyo Glass’s SILICAGRIN, made using a unique manufacturing method, achieves the following performance that was not possible with a conventional grin lens. Their performance is overwhelmingly effective for fiber probes and fiber catheters for biomedical applications.
What only SILICAGRIN can do “Pure single mode beam”
Silica-made single mode GRIN lens. This is the most important feature of SILICAGRIN, which is rare in the world.
There are other 125μm quartz GRIN lenses on the market, but they are all made by adjusting the NA (Numerical Aperture) of Graded Index fiber (GI) for optical telecommunication and are using the same manufacturing method as telecomm fibers such as MCVD (Modified Chemical Vapor Deposition). The same manufacturing method results in a refractive index called “Central Dip”, distortion of the output beam, and instability.
Please refer to the graph on the right. SILICAGRIN’s profile is a perfect Gaussian distribution with no distortion. A laser beam propagated in a single mode for diagnosis and therapeutics is expanded, focalized, and collimated as it is in a pure single mode. That is SILICAGRIN’s mission.
Now, let’s open the door of SILICAGRIN!
Product Name
SILICAGRIN Collimator
Beam Shape
Thin and Long
Product Name
SILICAGRIN LEC (Lateral Emitting Collimator)
Beam Shape
Thin, Long, and Lateral
Product Name
SILICAGRIN Condenser
Beam Shape
Short Focalized and Wider
Product Name
SILICAGRIN BEX (Beam Expander)
Beam Shape
Beam Expansion
Specifications
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| Product Name | SILICAGRIN Collimator | SILICAGRIN LEC | SILICAGRIN Condenser | SILICAGRIN BEX | Unit |
| Beam Shape | Thin and Long | Thin, Long, and Lateral | Short Focalized and Wider | Beam Expansion | |
| Outer Diameter | 125(250) | 125(250) | 125(250) | 125(250) | µm |
| Beam waist distance (L0)* | 0.2 – 2.0 | 0.2 – 2.0** | ＜ 0.25 | – | mm |
| Beam waist diameter (2ω0)* | 20 – 40 | 20 – 40** | ≥ 4 | – | µm |
| Beam diameter | – | – | – | 40 – 60 | µm |
| Wavelength | 370 – 1700 | nm | |||
*Measurement with SMF at 1550nm
**Before angled polishing
SILICAGRIN FAQ
- Can SILICAGRIN be customized?
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Yes. We can do everything meets your needs, such as those elating to NA, pitch, tipprocessing (angled polishing), coating, etc.
- Is SILICAGRIN already used in medical fiber catheters?
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Yes. SILICAGRIN is already used in certified OCT fiber probes and has proven track record of many successful deliveries and clinical use.
- What shapes do you sell SILICAGRIN in?
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SILICAGRIN is sold as a pigtail with a connector on one end, with an inner coil or catheter. While the pigtail is also manufactured by us, we also fuse it to products supplied by our customers.
- Do you sell SILICAGRIN fiber lenses on their own?
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We do not sell SILICAGRIN fiber lenses on their own. SILICAGRIN is sold in an SMF-fused state only.
- Do you of fer prototypes and mass production?
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Yes. We of fer everything from small-lot prototypes for evaluation experiments to the mass production of 60,000 pieces per year.
Catalog Download
English Edition
(PDF 12.00MB)
中文版
(PDF 8.01MB)
*The information reflected in this datasheet is subject to change and the product described herein may be modified or discontinued without notice.
*The applications listed in this catalog are only ideas from Toyo Glass Co., Ltd., and we cannot guarantee the effectiveness of an application for actual medical devices, diagnostics, or treatments.