What is the expected deployment timeline for 5G in the US market? 
 have initial deployment, followed by densification and then more and more geographies have been a rollout. It's similar to what we saw with our 3G and things like that. So how aggressively things start, I think it's already happening in countries like Japan and we are seeing some pretty good traction and even though, we are in the home turf, one of our major competitors. We are doing pretty well in that market, which gives me confidence that our products are quite good. In terms of the U.S., I think U.S. will be the next thing, I mean clearly, there is China, and that's already been going on for quite a while. In terms of the next big deployment, markets will be U.S., and in U.S., we have an interesting situation of three players now vying for the 5G crown. That's why I think we will probably see things happening sooner rather than later, because there is now a competition. It's no longer a duopoly with two major players kind of moving at a kind of link-link node-node type pace, where they take the time. Right now there's three players, it's very difficult to sustain a collusion or anything like that.
So I think things are going to happen much quicker in U.S., maybe starting sometime next year, later this year. I think that the next one would be Europe and I think Europe is really about a year behind U.S. into some deployments and we probably should start seeing some things happens in Europe sometime next year.
Richard Shannon -- Craig-Hallum Capital Group LLC -- Analyst
Okay, great. Thanks for that color. Oleg, my follow-on question is in your fiber business, you've talked, I think, for at least couple of quarters about a fairly robust cycle 400-gig, maybe if you can give us a sense of when that turns into a robust cycle in terms of fiber. And then how do you see the 400-gig generation versus the last two generations of at least as positive or even better. How do you view that?
Oleg Khaykin -- President and Chief Executive Officer
Well, I think, if anything, I see like -- when we went from one-gig to 10-gig, 10-gig to 100-gig, what I've seen with each one is deterioration. The amount of time between the start of deployment of one and started deployment of another technology node that time has been getting shorter and shorter. I mean, we only went to 100-gig in earnest, a couple of years ago. And now we are already seeing 400-gig and we already, our customers want to see 800-gig. So I think the fiber is really, from my perspective, I think the time of each node deployment is shortening and we may see multiple technology core exist. I mean we may see data centers moving to higher bit-rate sooner and metro areas kind of transitioning from 10-gig to 100-gig slower, but we will be seeing all these nodes co-existing in parallel rather than with one ramping up the other one ramping down. And just completely new customer segments, it's no longer the traditional telecom transport. I mean we see the back lane overall the data center boxes is becoming optical and that's really driving a lot of the fiber demand.
Richard Shannon -- Craig-Hallum Capital Group LLC -- Analyst
Okay, great. That's a great perspective, Oleg. Thanks for that.
Operator
Next up, we have Tim Savageaux from Northland Capital. Your line is open.
Tim Savageaux -- Northland Securities Inc. -- Analyst
Good afternoon and congrats on the results. A couple of questions here. First, over on the OSP side or 3D sensing, in particular, you had mentioned and we've heard a little bit of this before today, about an increasing level of activity around world-facing in the Android universe and you'd also mentioned that there is a potential source of upside, and I think your Android contribution to 3D sensing to date has been pretty low, if not minimal. And so my question is basically an upside to what baseline, when you say that which is to share with a robust Android rollout in second half of calendar '21, your fiscal '22 drive the same sort of double-digit growth you're seeing in 3D sensing next year even with, say your top customer sort of flattish.
Oleg Khaykin -- Preside
 have initial deployment, followed by densification and then more and more geographies have been a rollout. It's similar to what we saw with our 3G and things like that. So how aggressively things start, I think it's already happening in countries like Japan and we are seeing some pretty good traction and even though, we are in the home turf, one of our major competitors. We are doing pretty well in that market, which gives me confidence that our products are quite good. In terms of the U.S., I think U.S. will be the next thing, I mean clearly, there is China, and that's already been going on for quite a while. In terms of the next big deployment, markets will be U.S., and in U.S., we have an interesting situation of three players now vying for the 5G crown. That's why I think we will probably see things happening sooner rather than later, because there is now a competition. It's no longer a duopoly with two major players kind of moving at a kind of link-link node-node type pace, where they take the time. Right now there's three players, it's very difficult to sustain a collusion or anything like that.
So I think things are going to happen much quicker in U.S., maybe starting sometime next year, later this year. I think that the next one would be Europe and I think Europe is really about a year behind U.S. into some deployments and we probably should start seeing some things happens in Europe sometime next year.
Richard Shannon -- Craig-Hallum Capital Group LLC -- Analyst
Okay, great. Thanks for that color. Oleg, my follow-on question is in your fiber business, you've talked, I think, for at least couple of quarters about a fairly robust cycle 400-gig, maybe if you can give us a sense of when that turns into a robust cycle in terms of fiber. And then how do you see the 400-gig generation versus the last two generations of at least as positive or even better. How do you view that?
Oleg Khaykin -- President and Chief Executive Officer
 Well, I think, if anything, I see like -- when we went from one-gig to 10-gig, 10-gig to 100-gig, what I've seen with each one is deterioration. The amount of time between the start of deployment of one and started deployment of another technology node that time has been getting shorter and shorter. I mean, we only went to 100-gig in earnest, a couple of years ago. And now we are already seeing 400-gig and we already, our customers want to see 800-gig. So I think the fiber is really, from my perspective, I think the time of each node deployment is shortening and we may see multiple technology core exist. I mean we may see data centers moving to higher bit-rate sooner and metro areas kind of transitioning from 10-gig to 100-gig slower, but we will be seeing all these nodes co-existing in parallel rather than with one ramping up the other one ramping down. And just completely new customer segments, it's no longer the traditional telecom transport. I mean we see the back lane overall the data center boxes is becoming optical and that's really driving a lot of the fiber demand.
Richard Shannon -- Craig-Hallum Capital Group LLC -- Analyst
Okay, great. That's a great perspective, Oleg. Thanks for that.
Operator
Next up, we have Tim Savageaux from Northland Capital. Your line is open.
Tim Savageaux -- Northland Securities Inc. -- Analyst
Good afternoon and congrats on the results. A couple of questions here. First, over on the OSP side or 3D sensing, in particular, you had mentioned and we've heard a little bit of this before today, about an increasing level of activity around world-facing in the Android universe and you'd also mentioned that there is a potential source of upside, and I think your Android contribution to 3D sensing to date has been pretty low, if not minimal. And so my question is basically an upside to what baseline, when you say that which is to share with a robust Android rollout in second half of calendar '21, your fiscal '22 drive the same sort of double-digit growth you're seeing in 3D sensing next year even with, say your top customer sort of flattish.
Oleg Khaykin -- Preside