# iPhasematch > Calculates nonlinear optical phasematching conditions for wavelength conversion using Sellmeier equations. (iPhone/iPad app by Yushi Kaneda.) - Source: https://appshunter.io/ios/app/iphasematch/id492370060 (this page in markdown: same URL + `.md`) - Developer: [Yushi Kaneda](https://appshunter.io/developer/492370063) - Category: Education - Price: Free - Rating: 5.00/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 15.6 · 6 MB - Languages: American English - Released: 2012-01-18 - Data updated: 2026-06-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/iphasematch/id492370060/reviews.md ## What is iPhasematch? iPhasematch allows you to calculate the phasematching condition of nonlinear wavelength conversion such as SHG or SFM based on published Sellmeier equiations. Downconversion (OPO) can be figured out by the reverse of SFM. It is a subset of the 'Qmix' function of a famous Windows software SNLO by Dr. Arlee Smith. This App does some of what SNLO does on your iOS device. It takes the crystal, two input wavelengths, and temperature and gives the phasematching orientations, effective nonlinear optical coefficients, walk-off angles, angular tolerance and temperature tolerance. In case of SHG, it also gives spectral tolerance. In biaxial crystals, it gives only the phasematching orientations in the principal planes, i.e., either theta=90 deg. or phi=0 or 90deg. Currently supported crystals: BBO, BiBO, CBO, CLBO, LB4, LBO, KBBF, KDP, KD*P, KN, KTP, Mg:LN, Mg:sLN, RBBF, RTP, YAB. NOTE: dn/dT data for LB4 was picked up from discrete data points in the reference and linearly extrapolated. Interface should be intuitive, giving phasematching with a tap of "PM" button,refractive index with "index" button and group index with "Gp.Idx" button, for the given condition (crystal, wavelengths, and temperature). DISCLAIMER: I cannot be held responsible for the result of the calculation it gives. I make every effort to make it accurate, and bug-free, but there could be errors in code. Please just use this on your own discretion. ## Key features - Phasematching condition calculation - Sellmeier equation integration - Effective nonlinear optical coefficients - Walk-off and angular tolerance - Temperature tolerance - Supported crystal list ## Frequently asked questions about iPhasematch ### What is iPhasematch used for? iPhasematch calculates the phasematching condition for nonlinear wavelength conversion processes like SHG and SFM. It provides key optical parameters for various crystals, aiding in optical research and design. ### Does iPhasematch support offline use? The description does not specify offline functionality. However, as a calculation tool, it is likely designed to function without a constant internet connection once installed on your iOS device. ### What crystals are supported by iPhasematch? iPhasematch currently supports a range of crystals including BBO, BiBO, CBO, CLBO, LB4, LBO, KBBF, KDP, KD*P, KN, KTP, Mg:LN, Mg:sLN, RBBF, RTP, and YAB. ### How accurate are the calculations in iPhasematch? The developer makes every effort to ensure accuracy and be bug-free, but users are advised to use the app at their own discretion due to potential errors in code. The disclaimer highlights that the developer cannot be held responsible for calculation results. ### What devices can I use iPhasematch on? iPhasematch is supported on iPhone and iPod devices. It is designed for iOS operating systems. ### How often is iPhasematch updated? The latest version is 1.13, last updated on May 12, 2025. This indicates a relatively active development cycle, with updates potentially occurring to improve functionality or fix bugs. ### What is the learning methodology of iPhasematch? iPhasematch utilizes published Sellmeier equations to perform its calculations. The interface is designed to be intuitive, allowing users to obtain refractive index, group index, and phasematching data with simple button taps. ### Does iPhasematch offer certifications? iPhasematch is a scientific calculation tool and does not offer any certifications. Its purpose is to provide data for research and educational purposes in nonlinear optics. ## Version history (last 5 releases) ### 1.13 — 2025-05-12 Temperature dependence of RBBF crystal is added. Light mode is enforced, even when the device is set to dark mode. ### 1.12 — 2021-01-20 Added (long overdue) Sellemeier equation for MgO-doped stoichiometric lithium niobate. ### 1.11 — 2016-12-21 Updated Sellmeier equation on KBBF based on recent publication on Applied Optics. ### 1.10 — 2016-06-01 Updated the Sellmeier equation for MgO:LN based on the recent publication by Prof. Umemura on Optics Communications (v367, p167 (2016).) ### 1.9 — 2015-09-11 Supports BiBO. ## Apps similar to iPhasematch | App | Rating | Price | Category | | --- | --- | --- | --- | | [CloudLabs Spherical mirrors](https://appshunter.io/ios/app/cloudlabs-spherical-mirrors/id1633283116) | — | Free | Education | | [EMwaveRT](https://appshunter.io/ios/app/emwavert/id1387286837) | — | Free | Education | | [Quantum Wave in a Box](https://appshunter.io/ios/app/quantum-wave-in-a-box/id1179258292) | 3.3 (4) | Free | Education | | [AR Fourier Optics Lab](https://appshunter.io/ios/app/ar-fourier-optics-lab/id6473918062) | — | Free | Education | | [EMpolarization](https://appshunter.io/ios/app/empolarization/id6446095365) | — | Free | Education | | [RayLab](https://appshunter.io/ios/app/raylab/id710190065) | 4.6 (63) | Free | Education | ## Related topics [iphasematch](https://appshunter.io/ios/topics/iphasematch) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*