← Pricing
Photonic Mode Solvers
Effective index method → finite-difference eigenmode (FDE)
Estimate waveguides and couplers free, as you type. Go Pro when the numbers have to hold up: full-vectorial modes on the real cross-section, mesh error printed, and S-parameters for your coupler.
Free
$0
Estimates as you type, in your browser
Find the design worth solving.
- The guided modes of strip, rib and slot waveguides: effective index, group index and fields
- Across wavelength, and with a free account, bend loss
- Coupler estimates: coupling length and κ² for straight couplers, S-bends and ring-bus arcs
- Sweep any dimension, and export CSV, with a free account
Open the PIC Waveguide Mode Solver →Open the PIC Directional Coupler Simulator →
FDE Pro
$249/yearor $25/month
Annual is two months free.
Full-vectorial, on the real cross-section
Then solve it in full.
- Full-vectorial modes: index, group index, fields and confinement
- Sweep wavelength and bend radius, with the bend's radiation loss at each radius
- Couplers in full: κ² and coupling length from the coupled pair, and S-parameters as Touchstone or CSV
- Sloped walls, from vertical down to 45°
- Accuracy you can see: mesh levels, each printed with its error
- Keep your work: Plus is included
How it works: mode solver →, coupler →How it was checked: mode solver →, coupler →
Questions
Monthly or annual: which should I pick?
Annual costs less: FDE Pro is $249 a year or $25 a month, so a year of monthly comes to $300. Monthly makes sense if you need it for one project. To switch, open the billing portal from your account page and pick the other plan. If anything goes wrong, email support@photizon.com and we'll move you at your next renewal.
I already have Plus. What happens if I buy a Pro product?
The Pro product includes Plus, so after you subscribe, cancel Plus from your billing portal so you're not paying for storage twice. If the Pro product is Thin-Film Pro, email support@photizon.com and we'll refund the unused part of your Plus term.
How do I cancel, and what happens to my data?
From your account page, through the Stripe customer portal. No email, no form, no retention call. Canceling stops the next renewal; access runs to the end of the term you already paid for. After that you keep what you saved: you can still open your designs, read your notes and version history, export the whole library as a JSON file, and delete any design or material, for as long as your account exists. Custom materials you defined stay viewable and usable in simulations; you just can't create or edit them any more.
Can I get a refund?
Yes, within 14 days, no questions asked, on your first paid term: your first year if you subscribed annually, your first month if you subscribed monthly. Email support@photizon.com within 14 days of that charge. Renewals after the first term aren't refundable except where the law says otherwise.
Can I get an invoice to expense it, or for my grant or department?
Yes. Invoice history is in the Stripe portal, linked from your account page. Prices exclude any applicable tax.
Does FDE Pro have a free trial?
Yes, once per account. It gives you a set number of runs inside a set window, both shown in the tool while it runs. There is no card at any point, and it never turns into a subscription. A run is one accepted job: a full-vectorial solve, or a sweep, which counts once however many jobs it runs as. Building a design, importing a file and reading a result you already have do not count, and a run lost to a failure on our side is put back. While it runs it includes Plus, so your design is still there next session. When it ends, nothing you saved is removed.