What is it that you want to achieve with the new window / tab? To run your angular application in parallel, or just to have an external link?
If you want to run it in parallel, then there will be a few issues that you'll come across concerning the shared data. You can read more in this post:
AngularJS: open a new browser window, yet still retain scope and controller, and services
But if you just want an option to open a new tab, then that can be done fairly easily:
Simplest - html solution: <a href="#" target="_blank">link/button</a>
or by using javascript alone: window.open('https://stackoverflow.com/', '_blank');
Here you can see more about that approach How to open a URL in a new Tab using javascript or jquery?
Or eventually implementing it in angular Open links in new window using AngularJS