Welcome To Prutha, Good luck with shopping.

4953 Vine Street San Diego, CA 92465


Mon – Sat 8:00 – 18:00
Sun – Closed

Quality Support
24/7 online feedback

About Coset

We are an industry-leading, alternative 400GBE plus transceiver-ready, optical parts manufacturer…


Our expert packaging process is the key to the reliability and functionality of semiconductor diode chips and without Coset’s..


Our state of the art manufacturing facilities, headquartered in Gwangju, South Korea, boasts facilities to meet any needs…


We are THE CHOICE of optical system manufacturers and optical network providers for 400GBE ready transceivers, TOSA/ROSA and optical transmission parts manufacturing.

Technology Driven

One of Coset’s core values since its inception is to be at the forefront of new technology and manufacturing cutting edge products, like pump lasers, leaving us far ahead of the competition.

Extensive Experience

Coset has over 20 years of experience in our field and every aspect of our operation puts that to use from the first time we might a client to the timely delivery of any of our high quality products.

Cost Effective Solution

Thanks to the efficiency and automation of our facilities, Coset has been able to pass the savings on to our clients to provide competitive products in the marketplace.

Excellent Customer Service

We realize our partnership with our customers is paramount to our continued success and our sales and customer care teams are always client-first driven.

Our Clients

We have partnerships and manufacture for multiple industry leaders including 3SP Technologies, O Net Technologies, Fujitsu, ThorLabs and Lumics just to name a few.

Latest News

제23기(2021년 사업년도) 사업보고서 및 감사보고서 게재

제23기(2021년 사업년도) 사업보고서 및 감사보고서 게재

주주님의 건승하심과 댁내의 평안을 기원합니다. 주주소집통지서에서 안내한 바와 같이 회사의 제23기(2021년 사업년도) 사업보고서 및 감사보고서를 첨부와 같이 게재합니다. 본 보고서는 전자공시시스템(http://dart.fss.or.kr)에도 공시되었으므로 참조하여 주시기 바랍니다. ※ 첨부  1. 사업보고서  1부              2. 감사보고서 ...

read more
제23기 정기주주총회 (The 23th Regular Stockholders’ General Meeting)

제23기 정기주주총회 (The 23th Regular Stockholders’ General Meeting)

  주주님께                                                                       제23기 정기주주총회 소집 통지서           주주님의 건승과 댁내의 평안을 기원합니다.         상법 제365조와 당사 정관 제17조에 의거하여 제23기 정기주주총회를 아래와 같이 개최(소집)하오니 참석하여 주시기 바랍니다.   1.      소집일시 : 2022년 3월 28일(월) 오전 11시  ...

read more