| Document and Entity Information | Oct. 10, 2023 |
| Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 10, 2023 |
| Entity Registrant Name | Coherent Corp. |
| Entity Incorporation, State or Country Code | PA |
| Entity File Number | 001-39375 |
| Entity Tax Identification Number | 25-1214948 |
| Entity Address, Address Line One | 375 Saxonburg Boulevard |
| Entity Address, City or Town | Saxonburg |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 16056 |
| City Area Code | 724 |
| Local Phone Number | 352-4455 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0000820318 |
| Common Stock [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock, no par value |
| Trading Symbol | COHR |
| Security Exchange Name | NYSE |
| Series A Mandatory Convertible Preferred Stock [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 6.00% Series A Mandatory Convertible Preferred Stock, no par value |
| Security Exchange Name | NONE |
| No Trading Symbol Flag | true |
